The paper designs a sort index structure aimed at subclass of Quarter Tree (QT) based on QT structure of global space information, designs and actualizes the algorithm of index file structure organized by B+ Tree, on base of analyzing file system, and analyzes the efficiency of the algorithm.

Study on Application of Full-text Indexing Technology in Office Automation System;

The paper analyzes the features of distributed full-text databases,and then puts forward a new full-text indexing model — the three-dimensional characteristic index space based distributed full-text indexing model.

This paper proposes two new full-text indexing models to improve query-processing efficiency of IR systems.

In this paper, a new full-text index model, subsequence array model, is put forward.

The decisive factor in full-text retrieval is the full-text index model it used,which can provide efficient management and quick retrieval of non-structured massive data.

Against this shortcoming, the most effective technology for information analysis is full-text index.

After discussing the five theory models and six automatic indexing ways, the paper emphasizes on the mechanisms of the two essential objects: full text indexing and database indexing.