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The Oxygen XML Web Author CSS support is compatible with most of what is offered by the standalone distribution of Oxygen XML Editor/Author. However, there are some exceptions:
  • The + (direct adjacent) and > (child selector) structural selectors cannot be used to match table-related elements.
  • Oxygen CSS extensions are ignored on print media. If an Oxygen CSS extension is used on the screen media, it will also be used on the print media.
  • Oxygen CSS extension properties and functions cannot be used in a rule that has a :hover pseudo-class in the selector. The attr function is also not supported in such a rule due to a lack of browser support.
  • The :hover pseudo-class is only available for mouse-enabled platforms.
  • Oxygen CSS extensions used in property values that express lengths may not behave as expected. Nevertheless, it is a good approximation.
  • Oxygen CSS extensions used in media queries may not behave as expected.
  • Oxygen synthetic DOM nodes comment, reference, cdata, pi, and error interfere with the + (direct adjacent) structural selector. For example:
    b + b {
    color: red;
    }
    will not match the following XML structure:
    <root>
      <b/>
      <!--comment-->
      <b/>
    </root>
  • Oxygen XML Web Author does not render non-table-row children elements of tables and non-table-cell elements of table-row elements.
  • A width or height property set on any element other than the root XML element may cause some resize handles (that cannot be disabled) to be displayed in IE 11. This is also true for elements that have a position property with a value of absolute or fixed. For more information about this issue, see this Microsoft Connect article.
  • Oxygen XML Web Author does not support the following:
    • :nth-last-of-type, :first-of-type, :last-of-type, :nth-last-of-type pseudo-classes.
    • -oxy-tags-color and -oxy-tags-background-color properties.
    • Subject selectors, since they are not supported by web browsers.
    • Specifying widths for inline elements.
    • Attribute selectors that use wildcard for the attribute name.
    • Oxygen XML Editor/Author CSS extensions to style :before and :after pseudo-elements, except in the content property.
    • CSS property values that contain the oxy_xpath function are not refreshed correctly.
  • The -oxy-foldable property does not work with elements that have: display: inline.
  • For security reasons, if an XML document references a CSS that is not included in the document's framework, the following editor variables cannot be expanded when they are referenced from the CSS: configured.ditaot.dir, dita.dir.url, ds, dsu, env, framework, frameworkDir, frameworks, frameworksDir, home, homeDir, makeRelative, oxygenHome, oxygenInstallDir, system, xmlCatalogFilesList, ps, tsf, pluginDirURL, pluginDir.

To overcome some of these limitations, you can use media queries described in Customization Tips.