16. Weak @import
Prev | Chapter 4. Other extensions | Next

## 16. Weak @import

The "`---`" prefix before an URL instructs XXE to silently skip the `@import` when the URL cannot be successfully resolved. Example:

    /* Do not report an error if the "MathML support" add-on
       has not been installed. */
    @import url(---mathml-config:xhtml5/mathml_support.imp);

Prev | Up | Next
15. url() is XML catalog aware | Home | 17. Modularizing a complex CSS style sheet using @property-group and @property-value