MySQL (libz
library required), PostgreSQL, iODBC, unixODBC, EasySoft
ODBC-ODBC bridge, InterBase, Oracle (see Section 5.5),
MS SQL back-ends support.
HTTP support.
HTTP proxy support.
HTTPS support.
FTP support.
NNTP support (both news:// and nntp:// URL schemes).
HTDB virtual URL scheme
support. One may build index and search through the big text
fields/blobs of SQL database.
Mirroring features.
text/html, text/xml, text/plain,
audio/mpeg (MP3) and image/gif built-in support.
External parsers support for other document types.
Ability to index multilingual sites using content negotiation.
Searching all of the word forms using ispell affixes and dictionaries
Basic authorization support. One may index password protected intranet HTTP servers.
Proxy authorization support.
Reentry capability. One may use
several indexing and searching processes at the same time even on the
same database. Multi-threaded indexing support.
Stop-list support.
<META NAME="robots" content="..."> and robots.txt support.
C language CGI web front-end.
Boolean query language support.
Results sorting by relevancy, popularity rank, last modified date and by importance
(a multiplication of relevancy and popularity rank).
Fuzzy search: different word forms, spelling corrections,
synonyms,
acronyms and abbreviations.
Various character sets support.
HTML templates to easily customize search results.
Advanced search options like time limits, category and tags limits etc.
Phrases segmenting for Chinese, Japanese, Korean and Thai languages.
Accent insensitive search.
mod_dpsearch - search module for Apache web server.
Internationalized Domain Names support.
The Summary Extraction Algorithm (SEA).
