On 21/02/2008, Michael Kay <mike(_at_)saxonica(_dot_)com> wrote:
Saxon will give you a compile time warning for this situation. However, if
there is no static type information available, then it can't do this. To get
maximum benefit from schema-aware processing, you should declare the types
of your variables and function parameters (and especially, the type of the
principal input).
Here's a little example to demonstrate that:
<xsl:stylesheet xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="2.0">
<xsl:import-schema>
<xs:schema>
<xs:element name="shapes" type="shapes"/>
<xs:element name="shape" type="xs:string"/>
<xs:complexType name="shapes">
<xs:sequence>
<xs:element ref="shape"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
</xsl:import-schema>
<xsl:variable name="input" as="schema-element(shapes)">
<shapes xsl:type="shapes">
<shape>Hello</shape>
</shapes>
</xsl:variable>
<xsl:template match="/" name="main">
<xsl:value-of select="$input/shap"/>
</xsl:template>
</xsl:stylesheet>
The xsl:import-schema element defines the schema for the input, and
the $input variable contains some XML that gets typed by that schema
using the xsl:type attribute.
In the main template the value-of select is deliberately misspelt,
which results in the following warning:
"The complex type shapes does not allow a child element named shap"
...which is great :)
--
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/
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