The XHTML Basic document type includes the minimal set of modules required to be an XHTML host language document type, and in addition it includes images, forms, basic tables, and object support. It is designed for Web clients that do not support the full set of XHTML features; for example, Web clients such as mobile phones, PDAs, pagers, and settop boxes. The document type is rich enough for content authoring.

XHTML Basic is designed as a common base that may be extended. The goal of XHTML Basic is to serve as a common language supported by various kinds of user agents.

This revision, 1.1, supercedes version 1.0 as defined in http://www.w3.org/TR/2000/REC-xhtml-basic-20001219. In this revision, several new features have been incorporated into the language in order to better serve the small-device community that is this language's major user:

1. XHTML Forms (defined in [XHTMLMOD])
2. Intrinsic Events (defined in [XHTMLMOD])
3. The value attribute for the li element (defined in [XHTMLMOD])
4. The target attribute (defined in [XHTMLMOD])
5. The style element (defined in [XHTMLMOD])
6. The style attribute (defined in [XHTMLMOD])
7. XHTML Presentation module (defined in [XHTMLMOD])
8. The inputmode attribute (defined in Section 5 of this document)

The document type definition is implemented using XHTML modules as defined in " XHTML Modularization" [XHTMLMOD].

Compound Document is the W3C term for a document that combines multiple formats. The CDF Working Group has defined CDRF 1.0 as a framework to describe such documents.

This document specifies WICD Mobile 1.0, a Compound Document profile based on XHTML, CSS, SVG and DOM, which conforms to CDRF 1.0 and WICD Core 1.0. WICD Mobile 1.0 is targeted at mobile agents and is a subset of WICD Full 1.0.

WICD stands for Web Integration Compound Document.