| SAXONICA | 
Saxon implements the xsl:import-schema declaration in the schema-aware
            product Saxon-SA only.
         
The namespace attribute specifies the target namespace of the schema to be
            imported. Specify namespace="" to import a schema with no target namespace.
         
The schema-location attribute specifies where the schema document can be
            found. This URI is passed through the URIResolver in the same way as the URIs used on
            xsl:include and xsl:import. The attribute can be omitted only if
            a schema for the required namespace has already been loaded in the Configuration,
            for example if it has already been imported from another stylesheet module.
         
For further information see Schema Processing.