XML in a Nutshell, 3rd Edition

Authoring Compound Documents with Modular XHTML

XHTML 1.1 divides the three XHTML DTDs into individual modules. Parameter entities connect the modules by including or leaving out particular modules. Modules include:

Structure module, %xhtml-struct.module;

The absolute bare minimum of elements needed for an HTML document: html, head, title, and body

Text module, %xhtml-text.module;

The basic elements that contain text and other inline elements: abbr, acronym, address, blockquote, br, cite, code, dfn, div, em, h1, h2, h3, h4, h5, h6, kbd, p, pre, q, samp, span, strong, and var

Hypertext module, %xhtml-hypertext.module;

Elements used for linking, that is, the a element

List module, %xhtml-list.module;

Elements used for the three kinds of lists: dl, dt, dd, ul, ol, and li

Applet module, %xhtml-applet.module;

Elements needed for Java applets: applet and param

Presentation module, %xhtml-pres.module;

Presentation oriented markup, that is, the b, big, hr, i, small, sub, sup, and tt elements

Edit module, %xhtml-edit.module;

Elements for revision tracking: del and ins

Bi-Directional Text module, %xhtml-bdo.module;

An indication of directionality when text in left-to-right languages, like English and French, is mixed with text in right-to-left languages, like Hebrew and Arabic

Basic Forms module, %xhtml-basic-form.module;

Forms as defined in HTML 3.2 using the form, input, select, option, and textarea elements

Forms module, %xhtml-form.module;

Forms as defined in HTML 4.0 using the form, input, select