Description:

Features:
+ DocumentConverters
+ StemmerSupport for 13 languages
+ SimilaritySearch for english text (based on the Levenshtein distance)
+ NearSearch,
+ PluggableParsers
+ extended StopWords support
+ full integration in ZCatalog
+ TestFunctionality through ZMI
+ ExtensibleArchitecture
+ being MoreEfficient than the current !TextIndex
+ full globbing support (wildcard search)
+ NormalizationSupport (e.g. reducing accented characters to their base form)
+ full UnicodeAwareness
+ Relevance ranking of search results added. Searches are now ranked using an
extended cosine measure. The cosine measure is based on a vector model and
calculates the document "score" based on the frequency of the query terms inside
the document result set.
+ Much faster phrase/near search: the old implementation of TextIndexNG had to
perform a very expensive job at query time when phrase/near search was
performed. Re-using the !WidCode module of !ZCTextIndex made this operation less
expensive.
+ Left-truncation added: TextIndexNG can be configured creation-time time to
support left-truncation (means you can search for "*suffix") Left-truncation is
an option because this feature requires a second reverted index inside the
lexicion and much more memory!
+ optional auto-expansion support: This optional feature allows you to get
better search results when some of the query terms could not be found. The index
expands a query term "foo" to "foo*" if there was no hit for "foo". This
expansion is currently global for the index. This feature will be available on a
per-query basis in a later version. (Auto-expansion will be extended in a later
version to search for similiar terms)
+ improved HTML converter: now using Chris Withers "Strip-o-Gram" module
instead of the Strip-Tag-Parser
+ added converter for text/sgml
+ Similarity search (soundex, metaphone, doublemetaphone) dropped and replace
with a more general approach and language indepedant approach using the
Levenshtein distance.
+ range searches like "Fi..Foo"
+ substring searches "substring"