8L2C)pJJJJ IH(ȱH: =IH[H`@HcH $ + I /H`JLNGȄBȄFaK haaFF mJm# KKJ UJ )J ۈ) ;J3ȱJFȱJG JKaȄM aaNNJFLGJL L FAQS.1 u# ' # ' ''WWW.FAQ [# O *A3.FAQ.2.0 4 4d # O' +INET.BY.FAX 0 # O% FINDER.DATA O # ! INTERNET.03B ' FAQS.1 # ! FINDER.DATA : p ? &PRODOS `DaElH $?EGvѶK+`L HH Ly XP LM ŠϠĠӠS)*+,+`F)) (*=GJFjJJA QE'+ '== `@ S TSP8QSS8 m P o R(8R World Wide Web Frequently Asked Questions This document resides on the World Wide Web on Sunsite (URL is http://sunsite.unc.edu/boutell/faq/www_faq.html ). If you are unfamiliar with the term RURLS, read on and learn! Last update: 1/23/95 Content work? % 5.7.9: How can I restrict and control access to my server? % 5.7.10: Which format is better for WWW images, JPEG or GIF? % 5.7.11: How can I mirror part of another server? % 5.7.12: How can I keep robots off my server? % 5.7.13: How can I kean I create decent-looking tables and stop using
...? % 5.7.6: What is HTML Level 3 and where can I learn more about it? % 5.7.7: How can I make interlaced and transparent GIFs? And what are they? % 5.7.8: How come mailto: URLs donUnew page? % 5.7.3: Where can I learn how to create fill-out forms? % 5.7.3.1: How can I create hidden fields in forms (keeping state)? % 5.7.3.2: How can users email me through their browsers? % 5.7.4: How do I comment an HTML document? % 5.7.5: How cpublicize my work? % 5.5: Can I buy space on an existing server? % 5.6: How fast does my net connection have to be? % 5.7: Advanced Provider Questions % 5.7.1: How do I set up a clickable image map? % 5.7.2: How do I make a RlinkS that doesnUt load a Servers % 5.2.7: VM/CMS Servers % 5.2.8: Yeah, but which is best? % 5.3: Producing HTML documents % 5.3.1: Writing HTML directly % 5.3.2: HTML editors % 5.3.3: Converting other formats to HTML % 5.3.4: Checking your HTML for errors % 5.4: How do I ow can I provide information to the web? % 5.2: Obtaining Servers % 5.2.1: Unix Servers % 5.2.2: Macintosh Servers % 5.2.3: MS Windows, IBM OS/2 and MS Windows NT Servers % 5.2.4: MSDOS and Novell Netware Servers % 5.2.5: VMS Servers % 5.2.6: Amiga Hey, I know, IUll write a WWW-exploring robot! Why not? % 4.11: How do I send newsgroup posts in HTML to my web client? % 4.12: I canUt get SLIP. I want Mosaic. Is there a way? (YES!) % 5: Providing Information to the Web (Provider Questions) % 5.1: How can I save an inline image to disk? % 4.7: How can I get sound from the PC speaker with WinMosaic? % 4.8: I have a Windows PC (or a Macintosh). Why canUt I open WAIS URLs? % 4.9: IUm running XMosaic. Why canUt I get external viewers working? % 4.10:de RbrowsersS % 4.4: How can I access the web through a firewall? % 4.5: What is on the web? % 4.5.1: How do I find out whatUs new on the web? % 4.5.2: Where is the subject catalog of the web? % 4.5.3: How can I search through ALL web sites? % 4.6: Hrowsers % 4.3.2: MSDOS browsers % 4.3.3: Macintosh browsers % 4.3.4: Amiga browsers % 4.3.5: NeXTStep browsers % 4.3.6: X/DecWindows (graphical UNIX, VMS) browsers % 4.3.7: Text-based Unix and VMS browsers % 4.3.8: VM/CMS browsers % 4.3.9: Batch-mo.5: Are there books about the web? % 4: Accessing the Web (User Questions) % 4.1: Introduction: How can I access the web? (Even by email!) % 4.2: Browsers Accessible by Telnet % 4.3: Obtaining browsers % 4.3.1: MS Windows, IBM OS/2 and MS Windows NT b !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ts % 1: Recent changes to the FAQ % 2: Information about this document % 3: Elementary Questions % 3.1: What are WWW, hypertext and hypermedia? % 3.2: What is a URL? % 3.3: What are SGML and HTML? % 3.4: How does WWW compare to gopher and WAIS? % 3ep statistics about my web site? % 5.7.14: How can I generate web pages on the fly from a program? % 5.7.14.1: How can I generate GIF images on the fly from my CGI programs? % 6: Where can I discuss the Web? % 6.1: USENET Newsgroups % 6.2: Mailing Lists % 7: I want to know more. % 8: Credits 1: Recent additions and changes to the FAQ % Added htmlchek to validation section % Added information on interlaced GIFs % Added information on the WN Server % Added information on CGI script authoring % you can usually Rjust click on itS to read further detail. In fact, documents can be and often are linked to other documents by completely different authors -- much like footnoting, but you can get the referenced document instantly! To access the web, WWW project, started by CERN (the European Laboratory for Particle Physics), seeks to build a distributed hypermedia system. The advantage of hypertext is that in a hypertext document, if you want more information about a particular subject mentioned,Please excuse any formatting inconsistencies in the posted version of this document, as it is automatically generated from the on-line version. 3: Elementary questions 3.1: What are WWW, hypertext and hypermedia? WWW stands for RWorld Wide WebS. Thecom. In all cases, regard this document as out of date. Definitive information should be on the web, and static versions such as this should be considered unreliable at best. The most up-to-date version of the FAQ is the version maintained on the web. o listproc@www0.cern.ch with the following single line in the body (leave the subject blank): source http://sunsite.unc.edu/boutell/faq/www_faq.html Thomas Boutell maintains this document. Feedback about it is to be sent via e-mail to boutell@netcom.it.edu with: send usenet/news.answers/finding-sources in the body (not subject line) of your message, instead of asking me. If you want the HTML version but are located behind a firewall, you can acquire it from CERNUs WWW email server. Send mail tom.com in the directory pub/bo/boutell/faq. In addition, the most recently posted version of this document is kept on the news.answers archive on rtfm.mit.edu in /pub/usenet/news.answers/www/faq. For information on FTP, send e-mail to mail-server@rtfm.mand what this term means.) If you run a mirror site which automatically mirrors this document, please submit the URL for inclusion in the list of mirrors. Thanks to both Sunsite and Glocom. This document is also available by anonymous FTP from ftp.netc and best version is always available on the web as http://sunsite.unc.edu/boutell/faq/www_faq.html , and is mirrored in Japan (URL is http://www.glocom.ac.jp/mirror/sunsite.unc.edu/boutell/faq/www_faq.html ). (see section 3.2, RWhat is a URL?S to understww.users, comp.infosystems.www.providers, comp.infosystems.www.announce, comp.infosystems.www.misc, comp.infosystems.gopher, comp.infosystems.wais and alt.hypertext every four days (please allow a day or two for it to propagate to your site). The latestolUs RThe Whole InternetS or REFFUs Guide to the InternetS. The latter is available electronically by anonymous FTP from ftp.eff.org in the directory pub/Net_info/EFF_Net_Guide. This informational document is posted to news.answers, comp.infosystems.wthe concepts, software and access methods. It is aimed at people who know a little about navigating the Internet, but want to know more about WWW specifically. If you donUt think you are up to this level, try an introductory Internet book such as Ed Kr % IBM OS/2 WebExplorer % MapMaker: From xvUs Visual Schnauzer to an imagemap % Added comp.infosystems.www.announce % Added the Arena browser () 2: Information about this document This is an introduction to the World Wide Web project, describing Added information on the gd GIF-generating library % Updated email links section % More books! % Slipknot section updated % GLACI-HTTPD, a WWW server for Novell Netware % WWW mailing lists section % Updated URL for Gabriel WhiteUs HTML editor reviewsyou run a browser program. The browser reads documents, and can fetch documents from other sources. Information providers set up hypermedia servers which browsers can get documents from. The browsers can, in addition, access files by FTP, NNTP (the Internet news protocol), gopher and an ever-increasing range of other methods. On top of these, if the server has search capabilities, the browsers will permit searches of documents and databases. The documents that the browsers display are hypertext docummass, with new commercial and noncommercial sites appearing daily. 3.5: Are there books about the web? Yes, quite a few. A brief list follows. New entries are solicited. Please include ISBN numbers and/or ordering information. The Mosaic Handbook eyond Gopher usage in the last few months, according to the statistics-keepers of the Internet backbone. (Of course, World Wide Web browsers can also access Gopher servers, which inflates the numbers for the latter.) WWW has long since reached critical ypertext document without links, searches are the same, telnet sessions are the same) and WAIS (a WAIS index is a searchable page, returning a document with no links) data models as well as providing extra functionality. World Wide Web usage grew far bx and everything that is returned from the index is a document. In WWW, everything is a (possibly) hypertext document which may be searchable. In practice, this means that WWW can represent the gopher (a menu is a list of links, a gopher document is a hgopher and WAIS? While all three of these information presentation systems are client-server based, they differ in terms of their model of data. In gopher, data is either a menu, a document, an index or a telnet connection. In WAIS, everything is an inde/tei-tocs?div=DIV1%26id=SG ), a document provided by the Text Encoding Initiative. (Note: Some browsers apparently crash on this URL. ThereUs nothing wrong with the document; try another browser if you have problems.) 3.4: How does WWW compare to sed to define particular markup languages for particular purposes. HTML is just a specific application of SGML. You can learn more about SGML, and the rationale behind HTML, by reading A Gentle Introduction to SGML (URL is http://etext.virginia.edu/binnts on the World Wide Web are written in a simple Rmarkup language called HTML, which stands for Hypertext Markup Language. See section 5.3 for more information about creating HTML documents for use on the web. SGML is a much broader language which is u command to try a URL is RGO URLS (substitute the actual URL of course). In Lynx you just select the RGOS link on the first page you see; in graphical browsers, thereUs usually an ROpen URLS option in the menus. 3.3: What are SGML and HTML? Documemachine:port is also valid). When you are told to Rcheck out this URLS, what to do next depends on your browser; please check the help for your particular browser. For the line-mode browser at CERN, which you will quite possibly use first via telnet, thelt.hypertext % telnet://dra.com The first part of the URL, before the colon, specifies the access method. The part of the URL after the colon is interpreted specific to the access method. In general, two slashes after the colon indicate a machine name (n the Internet, such as a file or newsgroup. URLs look like this: (file: and ftp: URLs are synonymous.) % file://wuarchive.wustl.edu/mirrors/msdos/graphics/gifkit.zip % ftp://wuarchive.wustl.edu/mirrors % http://info.cern.ch:80/default.html % news:am with pointers to other media. This means that browsers might not display a text file, but might display images or sound or animations. 3.2: What is a URL? URL stands for RUniform Resource LocatorS. It is a draft standard for specifying an object oents. Hypertext is text with pointers to other text. The browsers let you deal with the pointers in a transparent way -- select the pointer, and you are presented with the text that is pointed to. Hypermedia is a superset of hypertext -- it is any mediu(Mac, Windows and X editions) From OUReilly. A short, sweet guide to the World Wide Web from a Mosaic userUs perspective. Mac and Windows versions Include Enhanced NCSA Mosaic on floppy disk; the X Window System version includes NCSA Mosaic on CD-ROM. Telnet or gopher to gopher.ora.com (log in as gopher) or find details on the web (URL is http://gnn.com/ora/ ). Wherever fine X Window System books and Nutshell Guides are sold. The World Wide Web Unleashed From Sams Publishing. By John December and NYou have three options: use a browser on your own machine (the best option), use a browser that can be telnetted to (not as good), or access the web by email (the least attractive, but for some itUs the only way). It is always best to run a browser on yp. ISBN: 0-7897-0016-6. Mosaic UserUs Guide From MIS Press. By Bryan Pfaffenberger. ISBN: 1-55828-409-5. Using Mosaic for Windows From Electric Avenue Press. By Stephen Gauer. ISBN: 0-969-8853-0-X. 4.1: Introduction: how can I access the web? d HTML and, of course, the obligatory directory of Web sites. Using Mosaic From Que. Ed. by Que Development Group. ISBN: 0-7897-0021-2. Covers NCSA Mosaic for Windows and the Macintosh. Using the World Wide Web From Que. Ed. by Que Development Groua special version of Enhanced NCSA Mosaic for Windows with built-in TCP/IP Winsock and dialer, and an automated configuration program (hence Rplug-n-playS). The book is an introduction to Mosaic and the Web with some coverage of creating a home page an Morris. Jan 1995. ISBN: 0-13-359290-1. NCSA Mosaic Handbook From Prentice Hall. By Amy K. Kreiling & Frank Baker. Jan 1995. ISBN: 0-13-196692-8. Plug-n-Play Mosaic for Windows From Sams. By Angela Gunn. ISBN 0-672-30627-1. 300 pages. Disks include L, imagemaps and the like. Also covers other types of Internet services. Hands-On Mosaic: A Guide for Window Users From Prentice Hall. By Dr. David Sachs & Henry Stair. ISBN: 0-13-172321-9. HTML Authoring for Fun & Profit From Prentice Hall. By Maryoddard Managing Internet Information Services From OUReilly and Associates. By Cricket Liu, Jerry Peek, Russ Jones, Bryan Buus & Adrian Nye. A good choice for those who will be installing and maintaining WWW servers; also includes documentation on HTM-259-1. MOSAIC Quick Tour From Ventana Press. By Gareth Branwyn. A good guide to installing and using NCSA Mosaic under Windows. Includes basic HTML and trouble-shooting chapters. RMore hand-holding than the FAQ and gives lots of details.S - Mari J. St Internet via Mosaic and World-Wide Web From Ziff-Davis Press. By Steve Browne. Details on obtaining Mosaic and Trumpet Winsock, getting it all set up, and what to do with it once it works. A chapter of interesting sites on the Web as well. ISBN: 1-56276r +1-317-581-3500 for ordering information. The HTML Manual of Style From Ziff-Davis Press. By Larry Aronson. Chapters: introduction to the WWW, the HTML language, writing HTML documents, and HTML examples. 120 pages. Available in December 1994. The web. ISBN: 0-672-30667-0. 400 pages. Includes information on setting up servers and handling forms results as well as HTML writing and editing. (URL is: http://slack.lne.com/lemay/theBook/index.html ) Available December 22nd, 1994. Call 1-800-428-5331 oata on the web. ISBN: 1-850-32141-8 (New York), 0-442-01962-9 (London). Available in December 1994. Teach Yourself Web Publishing with HTML in a Week From Sams Publishing. By Laura Lemay. Also oriented toward those who plan to publish materials on thes. ISBN: 0-672-30617-4. Call 1-800-428-5331 or +1-317-581-3500 for ordering information. Spinning the Web: How to Provide Information on the Internet From Van Nostrand Reinhold. By Andrew Ford. Oriented toward those with an interest in putting their deil Randall. Additional chapters contributed by others; I wrote the chapter on HTML editors and filters. Covers both user and provider issues in detail. Supporting pages available on the web (URL is http://www.rpi.edu/~decemj/works/wwwu.html ). 1057 pageour own machine, unless you absolutely cannot do so; but feel free to telnet to a browser for your first look at the web, or use email if the telnet command does not work on your system (try it first!). Note that Ryour machineS can be defined as a system you dial into from home, such as netcom or another account provider. Running a text-based browser on such a system is still preferable to telnetting to a faraway site. The following sections cover telnetting to a browser and obtaining your own browserys images incrementally while you read pages, which also display incrementally, making it the best browser at the time of this writing for those who connect to the web via modems. Also supports many extensions to HTML, although not all conform to the pdows/Mosaic. WinWeb From EINet. Available by anonymous FTP from ftp.einet.net in the directory /einet/pc/winweb as the file winweb.zip. Netscape From Netscape Communications Corp (URL is: http://home.mcom.com/info/index.html ). Downloads and displabrowser if you cannot do so. Cello Browser from Cornell LII. Available by anonymous FTP from ftp.law.cornell.edu in the directory /pub/LII/cello. Mosaic for Windows From NCSA. Available by anonymous FTP from ftp.ncsa.uiuc.edu in the directory PC/Win), a product which simulates SLIP through your dialup Unix shell account. If you only have non-Unix based dialup shell access, or have no PC at home, your best option at this time is to run Lynx on the VMS (or Unix, or...) system you call, or telnet to a tion. SLIP or PPP can be accomplished over phone lines. You can do this one of two ways: using a proper SLIP account, which requires the active cooperation of your network provider or educational institution, or using The Internet Adapter (section 4.12ml . 4.3.1: Microsoft Windows browsers NOTE: Most of these browsers require that you have SLIP, PPP or other TCP/IP networking on your PC. The sole exception is SlipKnot, which has limited features but operates well without a proper Internet connecs The preferred method of access of the Web is to run a browser yourself. Browsers are available for many platforms, both in source and executable forms. Here is a list generated from the authoritative list, http://info.cern.ch/hypertext/WWW/Clients.htuse from nearby. info.funet.fi (or telnet 128.214.6.102). Log in as www. Offers several browsers, including Lynx (goto option is disabled there also). fserv.kfki.hu Hungary. Has slow link, use from nearby. Login is as www. 4.3: Obtaining browserchnology. USA. www.huji.ac.il A dual-language Hebrew/English database, with links to the rest of the world. The line mode browser, plus extra features. Log in as www. Hebrew University of Jerusalem, Israel. sun.uakom.cs Slovakia. Has a slow link, only r system if your administrator has not done so already. The best plain-text browser, so move mountains if necessary to get your own copy of Lynx! www.njit.edu (or telnet 128.235.163.2) Log in as www. A full-screen browser in New Jersey Institute of Teorg A telnettable browser provided by the W3 coalition. www.cc.ukans.edu Offers Lynx, a full screen browser which requires a vt100 terminal. Log in as www. Does not allow users to RgoS to arbitrary URLs, so GET YOUR OWN COPY of Lynx and install it on you send http://www.earn.net/gnrt/www.html 4.2: Browsers accessible by telnet An up-to-date list of these is available on the Web as http://info.cern.ch/hypertext/WWW/FAQ/Bootstrap.html and should be regarded as an authoritative list. telnet.w3.first fails) containing the following single line. (What you put on the subject line doesnUt matter; blank is OK. This line should go in the text of the message.) You will receive as a reply a simple page intended to help you learn more about the Web. ; if neither of these are possible for you (because you have only an email-and-news connection to the Internet), here is how to access a web page by email: Send email to server@mail.w3.org (preferred) or to listserv@info.cern.ch (older address if the roposed standard. Netscape is a commercial product but can be evaluated free of charge for an unlimited period of time by individuals. Netscape supports some of the official extended HTML tags as well as its own variations. The 16-bit version works under both OS/2 and Windows. Available by anonymous FTP from the following sites (use the mirror closest to you; see the URL above for the latest list): % ftp://ftp.mcom.com/netscape/ % ftp://ftp.uu.net/networking/info-service/www/mcc/ % ftp://ftp.digital.cur PC has an Ethernet connection, or you have SLIP, you should be able to use it. DosLynx can view GIF images, but not when they are inline images (as of this writing). See the README.HTM file at the DosLynx site for details. You can obtain DosLynx by anr telnet to a browser if you cannot do so. DosLynx DosLynx is an excellent text-based browser for use on DOS systems. You must have a level 1 packet driver, or an emulation thereof, or you will only be able to browse local files; essentially, if yosection 4.12), a product which simulates SLIP through your dialup Unix shell account. If you only have non-Unix based dialup shell access, or have no PC at home, your best option at this time is to run Lynx on the VMS (or Unix, or...) system you call, oorking on your PC. SLIP or PPP can be accomplished over phone lines. You can do this one of two ways: using a proper SLIP account, which requires the active cooperation of your network provider or educational institution, or using The Internet Adapter (visual map of your exploration of the web. IBM WebExplorer can be acquired by anonymous FTP from ftp01.ny.us.ibm.net in the directory pub/WebExplorer/ . 4.3.2: MSDOS browsers NOTE: These browsers require that you have SLIP, PPP or other TCP/IP netwww.interport.net/slipknot/slipknot.html ) or send a blank email message to slipknot@micromind.com. IBM OS/2 WebExplorer A native IBM OS/2 web browser. WebExplorer is a multithreaded application and replaces the usual RbackS and RforwardS buttons with a rnative to forms.) You can obtain SlipKnot by anonymous FTP from ftp.netcom.com in the directory pub/pbrooks/slipknot or from oak.oakland.edu in the directory SimTel/win3/internet. For more information, see the SlipKnot information page (URL is http://w your Unix shell account. (However, it is lacking certain important features as a result, such as forms and validation; this will keep you from accessing some web pages. SlipKnot does support the
> .article.html cat >> .article.html echo \>> .article.html lynx .a depends greatly on your system; if you have a Mac or Windows system, the answer is completely different. But, as food for thought, here is a simple shell script I use on my Unix account to send posts from rn and related newsreaders to Lynx. Put this textc/robots/robots.html ) and learn about the emerging standards for exclusion of robots from areas in which they are not wanted. You can also read about existing robots there. 4.11: How do I send newsgroup posts in HTML to my web client? How to do thisto RindexS the CONTENTS of several hundred mpeg movies. Shudder. The moral: a robot that does what you want may already exist; if it doesnUt, please study the document World Wide Web Robots, Wanderers and Spiders (URL is: http://web.nexor.co.uk/mak/dome? Exactly the same software you would use for real SLIP; as far as your PC is concerned, it is a SLIP connection. If youUre unfamiliar with SLIP please check out a newsgroup relevant to your particular type of PC (Windows, Mac, etc). (This isnUt restricted to common systems; because all the emulation happens on your Unix shell account, your client machine can run anything that supports SLIP.) Details, please! I'm confused. Check out the TIA home page (URL is http://marketplace.com/tia/tiahome.htmo download the version appropriate to your processor.) You can read a detailed announcement at the FTP site, or by using the URL ftp://emwac.ed.ac.uk/pub/https/https.txt. A professional version is also available (URL is http://emwac.ed.ac.uk/html/intern and MS Windows NT Servers HTTPS (Windows NT) HTTPS is a server for Windows NT systems, both Intel and Alpha -- based. It is available via anonymous FTP from emwac.ed.ac.uk in the directory pub/https (URL is ftp://emwac.ed.ac.uk/pub/https). (Be sure t CERN servers. It provides text searching facilities as a standard feature. 5.2.2: Macintosh Servers There is a server for the Macintosh, MacHTTP, available at the URL http://www.uth.tmc.edu/mac_info/machttp_info.html . 5.2.3: MS Windows, IBM OS/2able at the URL http://bsdi.com/server/doc/plexus.html . WN Server The WN Server, available at the URL http://hopf.math.nwu.edu/docs/manual.html, is designed with an emphasis on security and flexibility, and takes a different approach from the NCSA andalthough it does not have the server-side-script capabilities of the NCSA and CERN servers. See the URL http://hopf.math.nwu.edu/. Perl server There is also a server written in the Perl scripting language, called Plexus, for which documentation is availal copy of archie to search for RwwwS in order to find a nearby site. GN Gopher/HTTP server The GN server is unique in that it can serve both WWW and Gopher clients (in their native modes). This is a good server for those migrating from Gopher to WWW, d the EIT httpd at the starter kit site (URL is http://wsk.eit.com/wsk/doc/ ). CERN httpd CERNUs server is available for anonymous FTP from info.cern.ch (URL is http://info.cern.ch/hypertext/WWW/Daemon/Status.html ) and many other places. Use your locEIT httpd EIT has created the WebmasterUs Starter Kit, which installs their WWW server on your system via the web through a painless forms interface. Recommended for those unfamiliar with server installation. You can learn more about the starter kit anxt/WWW/Daemon/Overview.html for more information on writing servers and gateways in general. 5.2.1: Unix Servers NCSA httpd NCSA has released a server, known as the NCSA httpd; it is available at the URL ftp://ftp.ncsa.uiuc.edu/Web/ncsa_httpd . e can be no off-machine access. 5.2: Obtaining Servers Servers are available for Unix, Macintosh, MS Windows, Windows NT, OS/2, and VMS systems. If you know of a server for another operating system, please contact me. See http://info.cern.ch/hyperteathan Torkington, available at the URL http://www.vuw.ac.nz/who/Nathan.Torkington/ideas/www-servers.html . If you only want to provide information to local users, placing your information in local files is also an option. This means, however, that ther, RgatewayS programs that convert an existing information format to hypertext, or a non-HTTP server that WWW browsers can access -- anonymous FTP or gopher, for example. To learn more about World Wide Web servers, you can consult a www server primer by N to the web? Information providers run programs that the browsers can obtain hypertext from. These programs can either be WWW servers that understand the HyperText Transfer Protocol HTTP (best if you are creating your information database from scratch)l), or send email to info@marketplace.com and request details about TIA. If you have a Macintosh, check out the Macintosh TIA UsersU FAQ (URL is: ftp://ftp.netcom.com/pub/bi/billa/tia/faq.html ) for additional help. 5.1: How can I provide informationet_toolchest/https/prof.htm ). NCSA httpd for Windows The NCSA httpd for Windows has most of the features of the Unix version, including scripts (which generate pages on the fly based on user input). It is available by anonymous FTP from the ftp site ftp.alisa.com in the directory pub/win-httpd, and documentation can be found at the URL http://www.alisa.com/win-httpd/index.html . SerWeb A simple, effective server for Windows writtten by Gustavo Estrella. Available by anonymous ftp from winftp.cicfind a plain text version (at the URL ftp://ftp.ncsa.uiuc.edu/ncsapubs/WWW/HTMLPrimer.txt) and a compressed Postscript version (at the URL ftp://ftp.ncsa.uiuc.edu/ncsapubs/WWW/HTMLPrimer.ps.Z). (Since the latter two are FTP URLs, you can fetch them by you would expect. If youUre used to marking up text in any way (even red-pencilling it), HTML should be rather intuitive. A beginnerUs guide to HTML is available at the URL http://www.ncsa.uiuc.edu/General/Internet/WWW/HTMLPrimer.html . You can also documents yourself You can write an HTML document with any text editor. Try the RsourceS button of your browser (or Rsave asS HTML) to look at the HTML for a page you find particularly interesting. The odds are that it will be a great deal simpler thanourself, which is not a very difficult skill to acquire, using an HTML editor, which assists in doing the above, and converting documents in other formats to HTML. The following three sections cover these possibilities in sequence. 5.3.1: Writing HTML lso available by anonymous FTP from ftp.netcom.com in the directory pub/bo/boutell/faq. 5.3: Producing HTML documents HTML is the simple markup system used to create hypertext documents. There are three ways to produce HTML documents: writing them ythe VM/CMS Browsers section. 5.2.8: Yeah, but which is best? To find out which server is best for your needs, you will want to consult Paul HoffmanUs Server Comparison Chart (URL is http://sunsite.unc.edu/boutell/faq/chart.html ). That document is aunysb.edu/AMosaic/home.html for details. 5.2.7: VM/CMS Servers A VM/CMS web server is available; see the URL http://ua1vm.ua.edu/~troth/rickvmsw/rickvmsw.html for more information. If you donUt yet have a web browser to try this URL with, check out rver avoids this overhead. Available at the URL http://kcgl1.eng.ohio-state.edu/www/doc/serverinfo.html . 5.2.6: Amiga Servers NCSAUs Unix server has been ported to the Amiga, and is bundled with the AMosaic browser. See the URL http://insti.physics.sve VMS server which uses DECthreads(tm). This is a potentially major performance advantage because VMS has a high overhead for each process, which is a problem for the frequently-forking NCSA and CERN servers that began life under Unix. A multithreaded seis http://www.glaci.com/info/glaci-httpd.html ). 5.2.5: VMS Servers CERN HTTP for VMS A port of the CERN server to VMS. Available at the URL http://delonline.cern.ch/disk$user/duns/doc/vms/distribution.html . Region 6 Threaded HTTP Server A natiers. It can be obtained via anonymous FTP from one of the following sites: inorganic5.chem.ufl.edu biochemistry.cwru.edu GLACI-HTTPD GLACI-HTTPD is a Netware Loadable Module which allows a Novell NetWare server to become a World Wide Web server (URL w.html ) for details, or fetch the package by anonymous FTP from ftp.netcom.com in the directory pub/kf/kfan. 5.2.4: MSDOS and Novell Netware Servers KA9Q KA9Q NOS (nos11c.exe) is a internet server package for DOS that includes HTTP and Gopher serv WEB4HAM Another Windows-based server, available by anonymous FTP from ftp.informatik.uni-hamburg.de as /pub/net/winsock/web4ham.zip. OS2HTTPD An OS/2 server, written by Frankie Fan. See the home page (URL is ftp://ftp.netcom.com/pub/kf/kfan/overviea.indiana.edu (or one of its mirror sites, such as nic.switch.ch), as the file serweb03.zip, in the directory /pub/pc/win3/winsock. There is also a Windows NT version of SerWeb, available by anonymous FTP from emwac.ed.ac.uk as /pub/serweb/serweb_i.zip. hand using FTP if you do not yet have a web browser.) There is also an HTML primer by Nathan Torkington at the URL http://www.vuw.ac.nz/who/Nathan.Torkington/ideas/www-html.html . 5.3.2: HTML editors Of course, most folks would still prefer to use a friendlier, graphical editor. Some editors are WYSIWYG (What You See Is What You Get), or close to it; others simply assist you in writing HTML by plugging in the desired markup tags for you from a menu. Fans of the EMACS editor can use EMACS and htntosh users, there is a near-WYSIWYG package called HTML Editor (URL is http://dragon.acadiau.ca:1667/~giles/HTML_Editor). ANT_HTML is a Word for the Macintosh template designed to convert Word documents into HTML documents in a WYSIWYG environment. Itbsd.uchicago.edu in the pub/phoenix subdirectory. Also for X users, there is a package called htmltext which supports WYSIWYG HTML editing. More information is available at the URL http://web.cs.city.ac.uk/homes/njw/htmltext/htmltext.html . For Maciter creating them. Another editor for X users: Phoenix (URL is http://www.bsd.uchicago.edu/ftp/pub/phoenix/README.html ) is a fully WYSIWYG HTML editor which insulates the user from direct control of the HTML tags. Available by anonymous FTP from www.use it with the HTML DTD (URL is http://info.cern.ch/hypertext/WWW/MarkUp/DTDHeading.html ). An editor for all X users: TkWWW (listed above under X browsers) supports WYSIWYG HTML editing; and since itUs a browser, you can try out links immediately afpported version is available for purchase from SoftQuad and its resellers. Also see Gabriel WhiteUs reviews of MS Windows HTML editors (URL is http://werple.mira.net.au/%7Egabriel/web/html/editors/ ). Another option, if you have an SGML editor, is to n cleaning up old ones. A Publish command changes appropriate SRC and HREF attributes from local paths to http locations. For more information, FTP the README file from the same directory, or send email to hotmetal@sq.com. A HoTMetaL Pro commercially susk (6MB of RAM minimum for MS Windows; swap files count). Other Unix systems may be supported by the time you read this; have a look on one of the sites above. Because it is context-sensitive, HoTMetaL guides users in creating new HTML documents and iuk/SoftQuad % % ftp://src.doc.ic.ac.uk/packages/WWW/ncsa/html/hotmetal/ % % ftp://askhp.ask.uni-karlsruhe.de/pub/infosystems/mosaic/contrib/SoftQuad % % ftp://ftp.cs.concordia.ca/pub/www % You need a Sun SPARC or Microsoft Windows system and 6MB of di users need at least 6 megabytes of free memory. (A 2-megabyte swap file should just barely do the trick on a 4MB machine.) Known mirrors: % ftp://ftp.ncsa.uiuc.edu/Web/html/hotmetal/ % % ftp://ftp.ifi.uio.no/pub/SGML/HoTMetaL % % ftp://sgml1.ex.ac. you canUt get through to one, try another, donUt give up! ThatUs what mirror sites are for. (Also be sure to use the copy closest to you geographically if possible.) Hotmetal is available for both Sun Sparc systems and Windows systems; note that WindowsASCII, RTF, or any other format possible in Word 6.0. Contact jswift@freenet.fsu.edu if you need more information. A WYSIWYG editor for the Web, SoftQuad HoTMetaL, is available for downloading at NCSA and numerous other sites. Many mirror sites exist; ifT_HTML.DOT is a Word for Windows 6.0 template designed to convert Word documents into HTML documents in a WYSIWYG environment. It includes a demo version of the ANT_PLUS utility, which converts HTML files to WYSIWYG. ANT_PLUS also converts HTML files to or called HTML Assistant with features to assist in the creation of HTML documents. It can be had by anonymous FTP from ftp.cs.dal.ca in the directory /htmlasst/. Read the README.1ST file in this directory for information on which files to download. ANml-helper-mode , an EMACS mode for HTML editing (URL is http://www.reed.edu/~nelson/tools/). There is also another Emacs HTML mode, html-mode.el (URL is ftp://ftp.ncsa.uiuc.edu/Web/html/elisp/html-mode.el). For Microsoft Windows users, there is an edit includes a demo version of the ANT_PLUS utility, which converts HTML files to WYSIWYG. ANT_PLUS also converts HTML files to ASCII, RTF, or any other format possible in Word. At the time of this writing it was scheduled to have been released on the Macintosh (it has long been available for Windows). Contact jswift@freenet.fsu.edu for more information. Also for Macintosh users, the BBEdit HTML extensions allow the BBEdit and BBEdit Lite text editors for the Macintosh to conveniently edit HTML documents.a newsgroup first to familiarize yourself before posting to it. % Submit it to the NCSA WhatUs New Page at the URL http://www.ncsa.uiuc.edu/SDG/Software/Mosaic/Docs/whats-new.html (see the page for details on how to submit your listing!). % Post it torectory pub/htmlchek. 5.4: How do I publicize my work? There are several things you can do to publicize your new HTML server or other offering: % Post to comp.infosystems.www.announce. PLEASE READ THE CHARTER POSTING FIRST. In general, always read s HTML documents for errors, creates a cross-reference, automatically expands entities (such as European characters) to their proper HTML form, and performs other useful services. htmlchek is available by anonymous FTP from ftp.cs.buffalo.edu in the dian even try it out over the web through an HTML form. The script is available by anonymous FTP from ftp.khoros.unm.edu in the directory pub/perl/www. Another such tool is htmlchek (URL is: http://uts.cc.utexas.edu/~churchh/htmlchek.html ), which checktent resources, such as pages that have moved (URL is http://wsk.eit.com/wsk/dist/doc/admin/webtest/verify_links.html). Also try weblint (URL is http://www.khoros.unm.edu/staff/neilb/weblint.html ), a Perl script that checks your HTML for errors; you cL documents for errors according to the latest specification; note that you are encouraged to set up the program on your own system if you make heavy use of the form. There is also a tool which will check the links in your documents for links to nonexisml/release.htm . 5.3.4: Checking your HTML for errors Tools to validate your HTML documents (check them for errors) are available. There is a form at the URL http://www.hal.com/%7Econnolly/html-test/service/validation-form.html which will check HTMsuch as VMS require you to quote mixed-case URLs when launching a borwser from the command line. This is NOT a bug in the browser.) There is also a Word for Windows template for writing HTML documents, available at the URL http://www.gatech.edu/word_htess WYSIWYG editing using various word processors: Rich Brandwein and Mike SendallUs List at CERN (URL is http://info.cern.ch/hypertext/WWW/Tools/Filters.html ). (Note that this URL contains uppercase and lowercase letters; certain operating systems he URL in double-quotes (SURLS). 5.3.3: Converting other formats to HTML There is a collection of filters for converting your existing documents (in TeX and other non-HTML formats) into HTML automatically, including filters that can allow more or lns uppercase and lowercase letters; certain operating systems wonUt allow mixed case on the command line, or will only allow it if it is quoted (VMS), so if you are launching Lynx or another client and specifying a URL at the command line, try quoting t/Mosaic/Docs/faq-software.html#editors, mentions several editors, including two for MS Windows. In some cases, the editor amounts to a set of macros for an existing word processor, which can provide a near-WYSIWYG environment. Note that this URL contaiRL is http://www.york.ac.uk/~ld11/BBEditTools.html ). it is available by FTP from ftp.york.ac.uk in the directory /pub/users/ld11/BBEdit_HTML_Tools.sea.hqx. NCSAUs List of Filters and Editors, for which the URL is http://www.ncsa.uiuc.edu/SDG/Software (URL is http://www.uji.es/bbedit-html-extensions.html .) You can also obtain the extensions package by anonymous ftp from sumex-aim.stanford.edu as info-mac/bbedit-html-ext-b3.hqx. There is an alternative BBEdit extension package available as well (U the newsgroup comp.infosystems.announce. Please read the group first to get a feel for the contents. You should not post to comp.infosystems.www.users,.misc,.providers, etc., but if you feel compelled to do so, please choose .misc as announcements are of interest to both providers and users (and those who wear both hats). % Submit it to the maintainers of various catalogs, such as the WWW Virtual Library (at the URL http://info.cern.ch/hypertext/DataSources/bySubject/Overview.html ) and the ALIWEB ouUre using all of your line for HTML pages, each of which takes 5 seconds to send, so your server is sending 12 pages a minute, or 720 pages an hour, or 17,000 pages a day (pages, not accesses; each inline image in a page generates an access, unless the g very large animations, this should be sufficient for anything you want to serve. More would be faster, but it also gets drastically more expensive. Given the above guidelines, letUs look at simultaneous access again. Under the worst case conditions, yages, itUs 150K. That should cover any reasonable HTML document, and small to medium external files. An MPEG movie might be a bit much. With a T1 line assumed to be sending 150K/second, you get 750K of HTML, or 4.5 megabytes in an external file. Barrin or 40K, which is still a small image. If you have a 28.8 line, you get to double those figures; for a 9600 line, figure 2/3rds of that size. On a 56K leased line assumed to be sending 5K/second, you get 25K of HTML, or mixed HTML/data. For external imyou get 4 * 1.4 or 5.6K of HTML. If you want to include a single inline image, thatUs 2 seconds of startup, so youUre down to 3 * 1.4 or 4.2K of HTML + image. This means smallish HTML pages, and simple inline images. For external files, you get 29 * 1.4modem lines, this is nearly a second for each HTTP connection, which is significant. For leased lines, itUs more like .1 or .2 seconds, which is not significant. On a 14.4 line assumed to be sending 1.4K bytes of data/second, with a 1 second startup, the line, compression on modem lines, and anything thatUs less than 10% of the total (or even a little bit more than 10%). The one simplification not to ignore is the multiple packet round-trips it takes to get data flowing through an HTTP channel. For /etc is: It should take at most 30 seconds to send an external file. Given these rules, itUs pretty straightforward to work out how large an HTML page and external files can be. At least, itUs easy after you simplify things by ignoring IP overhead on ow. Since external images/audio/etc. are somewhat exceptional, allow more time for them. If you think they should have the same restrictions as above, buy the bandwidth your site will need to do so. However, the rule of thumb for external images/audio rule of thumb is: It should take at most 5 seconds to send a page. The five second rule dates from command line days, when that was about how long people would wait before getting impatient with the system. It seems like a reasonable number to use n thumb is: Don't worry about simultaneous access. Unless you have a very large site, simultaneous access is not a problem. If you have a very large site, you need as much bandwidth as you can afford. There is a bit more about this below. The seconder (mwm@contessa.phone.net). The answer is It depends. What it depends on is what kind of things you want to provide on your server. Here are some rules of thumb to use when deciding what kind of connection you need for your server. The first rule ofist of sites offering WWW space for lease is available (at the URL http://union.ncsa.uiuc.edu/www/leasing.shtml ). 5.6: How fast does my net connection need to be? The following response to this very-frequently-asked-question was provided by Mike Meyindex (at the URL http://web.nexor.co.uk/aliweb/doc/aliweb.html ). % Read Gareth ReesU guide to publishing on the World Wide Web. (URL is http://www.cl.cam.ac.uk/users/gdr11/publish.html ). 5.5: Can I buy space on an existing server? Yes, you can. A lclient cached it). This makes you one of the busier sites on the web. While youUll have contention problems before you get to this point, anything but a modem connection will be sending most pages in a small fraction of five seconds, which should leave plenty of bandwidth with no contention. If you have this kind of access rates on a modem line, you should seriously consider upgrading your connection. The bottom line on simultaneous access is that the WWW server is more likely to have contention wit do this, more "cleanly" (ok, ok, I hear your groans). HTTP now supports a response code of 204, which is no operation. Some browsers such as Mosaic/X 2.* support it. To use it, make your script a nph script and output an HTTP/1.0 204 header. Somethingvisible result. That is, not text/plain, not text/HTML, not : image/gif. The entire results are the side effects of the : script and nothing should be returned to the viewer. : It would be nice to have an internally supported null viewer : so that I couldo possibilities. Rob McCool of NCSA provided the following wisdom on the subject: Yechezkal-Shimon Gutfreund (sg04@gte.com) wrote: : Ok, here is another bizzare request from me: : I am currently running scripts which I "DO NOT" want to return : any S that doesnUt load a new page? Such links are useful when a form is intended to perform some action on the server machine without sending new information to the client, or when a user has clicked in an undefined area in an image map; these are just twkit has been installed, Tkmapedit provides a WYSIWYG imagemap editor which is capable of directly testing links if the tkWWW web browser is available. Available by anonymous FTP from the TCL archive on ftp.aud.alcatel.com. 5.7.2: How do I make a Rlinkis found in the same directory). Alternatively, you may want to use MacMapMaker, also available from ftp://ftp.uwtc.washington.edu/pub/Mac/Network/WWW (the same directory). Tkmapedit For Unix systems and other systems on which the Tk/Tcl language toolml ) WebMap On the Macintosh, you may want to use WebMap (URL is ftp://ftp.uwtc.washington.edu/pub/Mac/Network/WWW ). . It produces both NCSA and CERN-compatible maps, which can also be used with MacImagemap and a Macintosh-based server (MacImagemap ld like to make an entire directory of images available (but note that you should also make textual links to allow those with text- based browsers to download the images for external viewing). (URL is: http://icg.stwing.upenn.edu:80/~mengwong/mapmaker.ht for Microsoft Windows and the X Window System. MapMaker For users of John BradleyUs xv image display software for the X Window System, Mapmaker can turn the miniature images created by xvUs Visual Schnauzer into an imagemap. This is useful if you wou. So read your server documentation, and don't waste time making maps before making sure you have the necessary tools to deliver them. Mapedit Mapedit (URL is: http://sunsite.unc.edu/boutell/mapedit/mapedit.html ) is a WYSIWYG imagemap editing tooland a cooperative web server administrator. It is not usually as simple as wrapping a link around an IMG SRC tag and adding the ISMAP directive; the server must also be told about the map file, and the way to accomplish this varies from server to servere URL http://hoohoo.ncsa.uiuc.edu/docs/setup/admin/Imagemap.html . Using imagemaps requires that you create a map file; you can do this by hand or with a WYSIWYG tool. VERY IMPORTANT: Creating imagemaps requires a real web server (not an FTP server) ndicate in HTML that you want an image to be clickable, and how to configure your server to do something with the clicks returned by Mosaic, Chimera, and other clients capable of delivering them. You can read about image maps and the NCSA server at thh other uses of the line than with itself. Since I don't know what else you use your line for, I canUt factor it in. You'll have to consider that issue yourself. 5.7.1: How do I set up a clickable image map? There are really two issues here: how to i like: HTTP/1.0 204 No response Server: Myscript/NCSA httpd 1.1 (You can learn more about nph scripts from the NCSA server documentation at the URL http://hoohoo.ncsa.uiuc.edu/docs.) Essentially they are scripts that handle their own HTTP response codes. 5.7.3: Where can I learn how to create fill-out forms? Writing an HTML form is easy, but the form doesnUt accomplish anything until you write a CGI program to interpret the results on the server side! For more information, see section 5.7.14. HTML Level 3 and outputs html using the
...construct to represent tables, allowing you to write HTML Level 3 now, knowing that it will look better when clients are ready for it. 5.7.6: What is HTML Level 3 and where can I learn more about e.unc.edu in the directory pub/packages/infosystems/WWW/tools/html+tables.shar. This package requires the shell language Perl, which is primarily used on Unix systems but is also available for other systems (such as MSDOS machines). html+tables accepts g you to design proper tables and install those pages directly when table support arrives in the majority of clients. You can do this using the html+tables package, by Brooks Cutter (bcutter@paradyne.com), which is available for anonymous ftp from sunsitmost implementations are incomplete. In some implementations, at the time of this writing, text in tables cannot be selected and/or cannot be a link. However, there is a way to use HTML Level 3 tables now and convert them automatically to HTML, allowind stop using
...? Tables are a standard feature in HTML Level 3, a new version of HTML. Unfortunately, they are at present implemented only by the latest NCSA Mosaic versions and the Viola and Emacs-W3 browsers, to my knowledge. In addition, uld otherwise be shown to the user, since some browsers (notably Mosaic) will still pay attention to tags inside the comment and close it prematurely. Thanks to Joe English for clearing up this issue. 5.7.5: How can I create decent-looking tables ante that comments do not nest, and the sequence -- may not appear inside a comment except as part of the closing --> tag. (It's officially allowed, but some browsers wonUt handle it properly.) You should not try to use this to Rcomment outS HTML that wont types of comment forms. If you want to learn how these forms actually work, see section 5.7.14. 5.7.4: How do I comment an HTML document? Use the tag. No known as the WWW Mailto Gateway (URL is http://www.mps.ohio-state.edu/mailto/mailto_info.html ). GetComments (URL is: http://everest.cs.ucdavis.edu/~hoagland/getcomments.html) is a more general package, also written in Perl, which can handle many differe CGI scripts, you can create a form which sends mail to you from any browser that supports forms. I've written a simple email forms package (URL is: http://siva.cshl.org/email/index.html ), which does it in ANSI C. There is also a package written in Perl,mailto: URL. Perhaps 80% of web users will be able to use such a link. But not all browsers support it. Installing an email form If you have access to the serverUs configuration files, or if your server administrator permits users to create their own5.7.3.2: How can users send me email through their browsers? There are two ways: Using a mailto: URL You can simply create a link which looks like this: Send Me Mail This works great for browsers that support the turned with form"> By now, most browsers can handle the hidden type, but understand that some browsers will fail to hide the field (and probably confuse the user). Note that RhiddenS doesnUt mean RsecretS; the user can always click on view source. See the section on email forms for a simple solution to the most commonly desired form. 5.7.3.1: How can I create hidden fields in forms (keeping state)? Use INPUT TYPE=hidden. An example: