implementation of the key mechanims.  Table of Contents#define NODE_IS_KEYED int	xsltAddKey			(xsltStylesheetPtr style,  					 const xmlChar * name,  					 const xmlChar * nameURI,  					 const xmlChar * match,  					 const xmlChar * use,  					 xmlNodePtr inst) 
void	xsltFreeDocumentKeys		(xsltDocumentPtr idoc) 
void	xsltFreeKeys			(xsltStylesheetPtr style) 
xmlNodeSetPtr	xsltGetKey		(xsltTransformContextPtr ctxt,  					 const xmlChar * name,  					 const xmlChar * nameURI,  					 const xmlChar * value) 
void	xsltInitCtxtKeys		(xsltTransformContextPtr ctxt,  					 xsltDocumentPtr idoc) 
Description
Macro: NODE_IS_KEYED#define NODE_IS_KEYED check for bit 15 set 
Function: xsltAddKeyint	xsltAddKey			(xsltStylesheetPtr style,  					 const xmlChar * name,  					 const xmlChar * nameURI,  					 const xmlChar * match,  					 const xmlChar * use,  					 xmlNodePtr inst) 
 add a key definition to a stylesheet 
| style: | an XSLT stylesheet |  | name: | the key name or NULL |  | nameURI: | the name URI or NULL |  | match: | the match value |  | use: | the use value |  | inst: | the key instruction |  | Returns: | 0 in case of success, and -1 in case of failure. |  
 Function: xsltFreeDocumentKeysvoid	xsltFreeDocumentKeys		(xsltDocumentPtr idoc) 
 Free the keys associated to a document 
Function: xsltFreeKeysvoid	xsltFreeKeys			(xsltStylesheetPtr style) 
 Free up the memory used by XSLT keys in a stylesheet 
Function: xsltGetKeyxmlNodeSetPtr	xsltGetKey		(xsltTransformContextPtr ctxt,  					 const xmlChar * name,  					 const xmlChar * nameURI,  					 const xmlChar * value) 
 Looks up a key of the in current source doc (the document info on @ctxt->document). Computes the key if not already done for the current source doc. 
| ctxt: | an XSLT transformation context |  | name: | the key name or NULL |  | nameURI: | the name URI or NULL |  | value: | the key value to look for |  | Returns: | the nodeset resulting from the query or NULL |  
 Function: xsltInitCtxtKeysvoid	xsltInitCtxtKeys		(xsltTransformContextPtr ctxt,  					 xsltDocumentPtr idoc) 
 Computes all the keys tables for the current input document. Should be done before global varibales are initialized. NOTE: Not used anymore in the refactored code. 
| ctxt: | an XSLT transformation context |  | idoc: | a document info |  
 Daniel Veillard  |