<xsl:import>
The <xsl:import> element is a top-level element that serves to import the contents of one stylesheet into another stylesheet. Generally speaking, the contents of the imported stylesheet have a lower import precedence than that of the importing stylesheet. This is in contrast to <xsl:include> where the contents of the included stylesheet have exactly the same precedence as the contents of the including stylesheet.
Syntax
xml
<xsl:import href=URI />
Required Attributes
href-
Specifies the URI of the stylesheet to import.
Optional Attributes
None.
Type
Top-level, must appear before any other child of <xsl:stylesheet> or <xsl:transform> in the importing stylesheet.
Defined
XSLT, section 2.6.2.
Gecko support
Mostly supported with a few issues with top level variables and parameters as of Mozilla 1.0.