Perl module for accessing parsed *ML instances

 The XML::Grove module provides simple access to the information set of
 parsed XML, HTML, or SGML instances using a tree of Perl hashes. This
 package also includes several extensions to XML::Grove that provide
 the following:
 .
  * returning element contents as a string
  * returning element contents as XML, HTML, or Canonical XML
  * processing entire groves using the visitor pattern
  * processing entire groves using PerlSAX
  * running a filter over all nodes in the grove
  * substituting values into an XML template grove
  * indexing a grove by ID or other attributes
  * accessing elements and objects via URL-like paths