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Provides a basic XSLT 2.0 and XQuery 1.0 processor (W3C Recommendations, January 2007). Command line interfaces and implementations of several Java APIs (DOM, XPath, s9api) are also included.

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package net.sf.saxon.style;
import net.sf.saxon.Configuration;
import net.sf.saxon.Err;
import net.sf.saxon.expr.*;
import net.sf.saxon.instruct.Executable;
import net.sf.saxon.instruct.SlotManager;
import net.sf.saxon.om.*;
import net.sf.saxon.pattern.Pattern;
import net.sf.saxon.sort.CodepointCollator;
import net.sf.saxon.sort.StringCollator;
import net.sf.saxon.trans.KeyDefinition;
import net.sf.saxon.trans.KeyManager;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.BuiltInAtomicType;
import net.sf.saxon.type.TypeHierarchy;
import net.sf.saxon.value.SequenceType;
import net.sf.saxon.value.Whitespace;

import java.net.URI;
import java.net.URISyntaxException;

/**
* Handler for xsl:key elements in stylesheet. 

*/

public class XSLKey extends StyleElement implements StylesheetProcedure {

    private Pattern match;
    private Expression use;
    private String collationName;
    private StructuredQName keyName;
    SlotManager stackFrameMap;
                // needed if variables are used
    /**
      * Determine whether this type of element is allowed to contain a sequence constructor
      * @return true: yes, it may contain a sequence constructor
      */

                public boolean mayContainSequenceConstructor() {
        return true;
    }

    /**
     * Get the Procedure object that looks after any local variables declared in the content constructor
     */

    public SlotManager getSlotManager() {
        return stackFrameMap;
    }

    public void prepareAttributes() throws XPathException {

        String nameAtt = null;
        String matchAtt = null;
        String useAtt = null;

		AttributeCollection atts = getAttributeList();

		for (int a=0; a