XHTML 1.0 (Second Edition) Strict in XML Schema This is the same as HTML 4 Strict except for changes due to the differences between XML and SGML. changed to xhtml simple by Tommi Lahtonen 15.2.2005 Namespace = http://www.w3.org/1999/xhtml For further information, see: http://www.w3.org/TR/xhtml1 Copyright (c) 1998-2002 W3C (MIT, INRIA, Keio), All Rights Reserved. The DTD version is identified by the PUBLIC and SYSTEM identifiers: PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd" $Id: xhtml1-strict.xsd,v 1.2 2002/08/28 08:05:44 mimasa Exp $ ================ Character mnemonic entities ========================= XHTML entity sets are identified by the PUBLIC and SYSTEM identifiers: PUBLIC "-//W3C//ENTITIES Latin 1 for XHTML//EN" SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml-lat1.ent" PUBLIC "-//W3C//ENTITIES Special for XHTML//EN" SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml-special.ent" PUBLIC "-//W3C//ENTITIES Symbols for XHTML//EN" SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml-symbol.ent" ================== Imported Names ==================================== media type, as per [RFC2045] comma-separated list of media types, as per [RFC2045] a character encoding, as per [RFC2045] a space separated list of character encodings, as per [RFC2045] a language code, as per [RFC3066] a single character, as per section 2.2 of [XML] one or more digits tabindex attribute specifies the position of the current element in the tabbing order for the current document. This value must be a number between 0 and 32767. User agents should ignore leading zeros. space-separated list of link types single or comma-separated list of media descriptors a Uniform Resource Identifier, see [RFC2396] a space separated list of Uniform Resource Identifiers date and time information. ISO date format script expression style sheet data used for titles etc. nn for pixels or nn% for percentage length pixel, percentage, or relative integer representing length in pixels these are used for image maps comma separated list of lengths =================== Generic Attributes =============================== core attributes common to most elements id document-wide unique id class space separated list of classes title advisory title/amplification internationalization attributes w3xml:lang language code (as per XML 1.0 spec) attributes for elements that can get the focus accesskey accessibility key character tabindex position in tabbing order onfocus the element got the focus onblur the element lost the focus =================== Text Elements ==================================== "Inline" covers inline or "text-level" elements ================== Block level elements ============================== "Flow" mixes block and inline and is used for list items etc. ================== Content models for exclusions ===================== a elements use "Inline" excluding a pre uses "Inline" excluding big, small, sup or sup ================ Document Structure ================================== ================ Document Head ======================================= content model is "head.misc" combined with a single title and an optional base element in any order The title element is not considered part of the flow of text. It should be displayed, for example as the page header or window title. Exactly one title is required per document. Relationship values can be used in principle: a) for document specific toolbars/menus when used with the link element in document head e.g. start, contents, previous, next, index, end, help b) to link to a separate style sheet (rel="stylesheet") c) to make a link to a script (rel="script") d) by stylesheets to control how collections of html nodes are rendered into printed documents e) to make a link to a printable version of this document e.g. a PostScript or PDF version (rel="alternate" media="print") =================== Document Body ==================================== generic language/style container =================== Paragraphs ======================================= =================== Headings ========================================= There are six levels of headings from h1 (the most important) to h6 (the least important). =================== Lists ============================================ Unordered list Ordered (numbered) list list item =================== Preformatted Text ================================ content is "Inline" excluding "img|object|big|small|sub|sup" ================== The Anchor Element ================================ content is "Inline" except that anchors shouldn't be nested ===================== Inline Elements ================================ generic language/style container forced line break emphasis strong emphasis program code sample =================== Images =========================================== To avoid accessibility problems for people who aren't able to see the image, you should provide a text description using the alt and longdesc attributes. In addition, avoid the use of server-side image maps. Note that in this DTD there is no name attribute. That is only available in the transitional and frameset DTD. ======================= Tables ======================================= Derived from IETF HTML table standard, see [RFC1942] th is for headers, td for data and for cells acting as both