Oxygen XML Author includes a built-in CSS validator integrated with the general validation support, bringing the usual validation features to CSS stylesheets.
The CSS properties accepted by the validator are the ones included in the current CSS profile that is selected in the CSS validation preferences. The profile CSS 3 with Oxygen extensions includes all the CSS 3 standard properties and the CSS extensions specific for Oxygen that can be used in Author mode. That means all Oxygen specific extensions are accepted in a CSS stylesheet by the built-in CSS validator when this profile is selected.
<?xml version="1.0" encoding="UTF-8"?> <css_keywords> <property name="custom"> <summary>Description for custom property.</summary> <value name="customValue1"/> <value name="customValue2"/> </property> </css_keywords>