HTML and CSS Reference
In-Depth Information
Table 3-1.
Core XHTML Versions
Version
Descriptive Name
Site
Status
Date
XHTML 1.0
A reformulation of HTML 4 in XML 1.0
R
1/26/2000
r. 8/1/2002
XHTML 1.1
Module-based XHTML
5/31/2001
r. 10/7/2010
XHTML 2.0
(XHTML2)
-
WD
4
7/26/2006
XHTML5
A vocabulary and associated APIs for XHTML
PR
1/22/2008
XHTML 5.1
A vocabulary and associated APIs for HTML
and XHTML
WD
12/17/2012
R: W3C Recommendation
PR: Proposed Recommendation
WD: W3C Working Draft
r: revised
Table 3-2.
Special and Mixed-Namespace XHTML Document Types
Version
Descriptive Name
Status
Date
XHTML 1.1 + MathML 2.0 + SVG 1.1
An XHTML + MathML + SVG Profile [15]
WD
8/9/2002
XHTML-MP 1.2
XHTML Mobile Profile
R
5
7/29/2008
XHTML-Print
XHTML-Print 2
nd
ed.
XHTML for Printing
R
R
9/20/2006
11/23/2010
XHTML+RDFa 1.0
RDFa in XHTML [16]
R
10/14/2008
XHTML+RDFa 1.1
Support for RDFa via XHTML Modularization [17]
R
6/7/2012
XHTML+RDFa 1.1 2
nd
ed.
Support for RDFa via XHTML Modularization [18]
R
8/22/2013
R: W3C Recommendation
WD: W3C Working Draft
XHTML 1.1 + MathML 2.0 + SVG 1.1 documents can be written in any of the compound languages, all of which
have their own document format (XHTML document, MathML document, or SVG document). The selected language
is the
host language
(see the “XHTML + MathML + SVG” section later in the chapter).
XHTML 1.0
According to the subtitle of its specification released in 2000 (and revised in 2002), XHTML 1.0 is “a reformulation of HTML
4 in XML 1.0” [19]. Similar to the three flavors of HTML 4.01, XHTML 1.0 also defines the Strict, Transitional, and Frameset
variants, all of which are the XML serialization of their corresponding predecessors. XHTML 1.0 Strict includes those
elements and attributes only that have not been deprecated in HTML 4.01. Every “missing” element and attribute can be
substituted by CSS styles. Similar to HTML 4.01 Transitional, XHTML 1.0 Transitional also provides the presentational
elements such as
center
or
font
that are not allowed in the Strict variant. Listings 3-3 and 3-4 show an example.
4
The XHTML2 specification is no longer actively developed, and was last updated in 2010.
5
The specification was standardized by Open Mobile Alliance not W3C.
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