||Implementation of IndexReader that works with set of DOM nodes in memory.
||TermDocs for searching over DOM nodes in memory
||Ordered set of terms used by NodeReader.
||TermPositions for searching over DOM nodes in memory
||Searcher executes full text queries against list of nodes and returns
nodes that match the query in the order of relevance (score) - most relevant
results will be return first.
Query syntax is the same as syntax of Lucene query, except it does not use
||Specialized parser for text queries that ignores query clauses that have