Documentation for cssxml

This is the XSD Schema for cssxml an experimental serialization of CSS in XML. Originally produced for the W3C MWI MobileOK Checker project (home page) in order to facilitate manipulation of CSS using XML tools.

This is an abstract element that allows a comment or an unknown at-rule almost anywhere.

A cssxml document has a cssxml element at the root together with the xmlcss namespace declaration.

The cssxml element contains zero or more import elements frolled by 0 or more ruleset, media or page elements.

Rulesets contain a number of selectors and a number of definitions. Multiple selectors can all have the same definitions applied to them. Selectors may have structure in relation to other selctors and to conditions as desribed under the documentation for the selector element.

The selector element applies to the element named in the element (or the pseudo attribute) and is qualified by the condition elements it contains. The contained condition elements are ANDed with each other. selector elements are also qualified by any child selector element which (together with its children) specifies the relationship that the element must have to some other (pseudo, parent, ancestor or preceding-sibling ) element.

Multiple selector element siblings are in an OR relationship. At the outermost selector level this is the means of representing:
a, b, c, d {property:value}
which is rendered as:
<ruleset>
<selector element="a">
<selector element="b">
<selector element="c">
<selector element="d">
<definition>...</definition>
</ruleset>

The rel attribute is prohibited on selector elements that have no selector parent, and is required on selectors that have a selector parent.

Because Pseudo elements are treated as children of the element they apply to, either the element or the pseudo attribute is required on all selectors - both may not be present.

The rel attribute is prohibited on selector elements that have no selector parent, and is required on selectors that have a selector parent.

The meaning of the type attribute of the selector element and the effect on the name and value attributes is as follows:

id

The condition arises from a selector of the form a#b {property: value;} the name attribute of the condition contains "b".

class

The condition arises from a selector of the form a.b {property: value;} the name attribute of the condition contains "b".

attribute

The condition arises from a selector of the form a[b] {property: value;} or a[b=c] {property: value;} the name attribute of the condition contains "b" and the value attribute, if any, contains c .

one-of-attribute

The condition arises from a selector of the form a[b~=c] {property: value;} the name attribute of the condition contains "b" and the value attribute contains c .

one-of-hyphen-attribute

The condition arises from a selector of the form a[b|=c] {property: value;} the name attribute of the condition contains "b" and the value attribute contains c .

position

The condition arises from a selector of the form a:first-child {property: value;} the name attribute of the condition contains "first-child" etc.

pseudo

The condition arises from a selector of the form a:b {property: value;} the name attribute of the condition contains "link" etc.

lang

The condition arises from a selector of the form a:lang(b) {property: value;} the name attribute of the condition contains b etc.

The meaning of the rel attribute is as follows:

ancestor

The selector is the ancestor of the enclosing selector. Corresponds to a b {property: value;} - i.e. the selector a will have rel "ancestor" to its parent selector b

parent

The selector is the parent of the enclosing selector. Corresponds to a > b {property: value;} - i.e. the selector a will have rel "parent" to its parent selector b

preceding-sibling

The selector is the preceding sibling of the enclosing selector. Corresponds to a + b {property: value;} - i.e. the selector a will have rel "preceding-sibling" to its parent selector b