2. Overview of Thai Text Indexing
Indexing Thai text documents is an essential process in
Thai information retrieval [4], [5], [6]. Indexing is a process
that creates the necessary data structure, known as indices,
for mapping keywords (also called indexing terms) to those
text docu-ments containing the keywords. In an information
retrieval system, it is necessary to index a text document first
to enable efficient lookup and retrieval of the text document
later. A number of data structures are used in indexing Thai
text documents. They include an inverted index, also called
inverted file, and suffix array. Inverted index is currently
regarded as one of the better index data structures for most
applications [1].