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To configure the CSS Validator preferences, open the Preferences dialog box (Options > Preferences) and go to CSS Validator.

You can configure the following options for the built-in CSS Validator of Oxygen XML Editor:

  • Profile - Selects one of the available validation profiles: CSS 1, CSS 2, CSS 2.1, CSS 3, CSS 3 with Oxygen extensions, SVG, SVG Basic, SVG Tiny, Mobile, TV Profile, ATSC TV Profile. The CSS 3 with Oxygen extensions profile includes all the CSS 3 standard properties plus 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.
  • Media type - Selects one of the available mediums: all, aural, braille, embossed, handheld, print, projection, screen, tty, tv, presentation, oxygen.
  • Warning level - Sets the minimum severity level for reported validation warnings. Can be one of: All, Normal, Most Important, No Warnings.
  • Ignore properties - You can type comma separated patterns that match the names of CSS properties that will be ignored at validation. As wildcards you can use:
    • * to match any string.
    • ? to match any character.
  • Recognize browser CSS extensions (also applies to content completion) - If selected, Oxygen XML Editor recognizes (no validation is performed) browser-specific CSS properties. The Content Completion Assistant lists these properties at the end of its list, prefixed with the following particles:
    • -moz- for Mozilla.
    • -ms- for Internet Explorer or Edge.
    • -o- for Opera.
    • -webkit- for Safari/Webkit.