As the Saxon AntTransform is no longer supported it is recommended to use the standard Ant XSLT task (see XSLT Task for documentation.
Example code is given below
<?xml version="1.0" encoding="UTF-8"?>
<project name="opsi" default="transformer" basedir=".">
<property file="ant.properties"/>
<property name="source.xml" location="share.xml"/>
<property name="output.xml" location="output.xml"/>
<!-- home directroy for Saxon -->
<property name="saxon.jar" location="saxon/saxon9.jar"/>
<path id="saxon.classpath">
<pathelement location="${saxon.jar}"/>
<pathelement location="saxon/saxon9he.jar"/>
</path>
<target name="transformer">
<xslt in="${source.xml}"
out="${output.xml}"
style="share.xslt"
processor="trax">
<factory name="net.sf.saxon.TransformerFactoryImpl"/>
<classpath refid="saxon.classpath" />
</xslt>
</target>
</project>