- From: Robert Burns <rob@robburns.com>
- Date: Tue, 31 Jul 2007 22:31:18 -0500
- To: HTML WG <public-html@w3.org>
Based on this thread, I offer the following text to substitute for the current subsection. proposed text/ [...] Content model: A head element followed by a body element. Within a compound document where metadata is handled by the host document namespace, authors may omit both the BODY and the HEAD. In these circumstances the content model for HTML is one or more block-level elements. [...] 3.6.2 The xmlns attribute: The html element represents the root of an HTML document or it may also be the root of an HTML subdocument within a namespace aware XML document with the namespace: "http://www.w3.org/1999/xhtml". Within the text/html serialization no namespace is required nor are namespaces recognized by an HTML5 UA. Simply for convenience — to make migration to and from XHTML mildly easier — authors may include a default namespace declaration even within the text/html serialization. For example: <html xmlns='http://www.w3.org/1999/xhtml' > Within the txt/html serialization such a namespace declaration has absolutely no effect and no meaning. Within XML serializations authors may use namespaces according to "Namespaces in XML 1.0"[2]. UAs processing text/html serialized documents must ignore all namespace declarations: including the "xmlns" attribute and any attribute prefixed with "xmlns:". UAs processing XML serialized documents must process namespaces according to "Namespaces in XML 1.0"[2] and its successors. NOTE: When parsed by an HTML parser, the @xmlns attribute ends up in the null namespace, not the "http://www.w3.org/2000/xmlns/" namespace as namespace declaration attributes would in XML. 3.6.3 Declaring script (writing system) and language On the root element, authors should [or must] set a value for the @dir attribute of either ltr (for let-to-right text) or rtl (for left- to-right text) on the root element of an HTML document. Leaving the value for @dir unspecified leaves the handling of text directionality up to the various UAs. For HTML documents, authors should [or must] declare a document language on the root element by setting the @xml:lang attribute on the root element, in accordance with RFC 3066 language code. For compatibility with non-HTML5 aware UAs, authors may set an identical language on the @lang attribute. In the case of a discrepancy between the two attributes, UAs must treat the @xml:lang attribute as authoritative. The direction and language may be overridden for any element within the HTML root to specify language and directionality exceptions within a document fragment. 3.6.4 Using HTML in compound documents: When using HTML within XML namespace aware compound documents when the metadata is handled adequately by the host document, authors may omit both the HEAD and BODY elements. The content model for the HTML element is then identical to the content model listed for BODY. /end proposed text Any corrections, enhancements or additions are welcome. [1]: <http://dev.w3.org/cvsweb/~checkout~/html5/spec/Overview.html? rev=1.78#the-root> [2]: <http://www.w3.org/TR/REC-xml-names/>
Received on Wednesday, 1 August 2007 03:31:39 UTC