The authors present IQ-Tree, which is a hybrid index based on Quad-tree and inverted files
. In , Li et al.
The hierarchical-codebook is also applied to generate multiple inverted files
to improve non-exhaustive search.
Sim([I.sub.q], [I.sub.j]) can be efficiently computed using inverted file
indexing because the size of vocabulary is usually very large, and therefore the histogram is normally very sparse.
: An inverted file
is used to store contents as mapping of different documents.
They propose and compare different schemes for storing and managing inverted files
using an embedded database system.
At this point, a search engine may take the list of query terms and search them against the inverted file
. In fact, this is the point at which the majority of publicly available search engines perform the search.
Keywords: Inverted file
, d-gap, Index compression, inverted list
It may be that the frequencies of real query terms are not distributed in this way, but we believe this method of query construction does not favor either inverted file
or signature file indexing, and thus provides a fair test.
First, they look at the database and its most important files - the bibliographic file (including a summary of the MARC record), the authority file, and the inverted file
. This last file, derived from the bibliographic file, is separate from it and is the file from which the user formulates queries and retrieves information.
Specifically, online commercial services and searchable database archives on publisher Web sites should continue to maintain the inverted file
index terms and tags that identify material barred from full-text delivery by the Tasini decision.
Improved inverted file
processing for large text databases.
The new output charges eliminate the penalties high connecttime costs attach to slow typing or browsing through inverted file
indexes or sample records.