Document Presentation and Highlighting

Typically, a query application enables the user to view the documents returned by a query. The user selects a document from the hit list and then the application presents the document in some form.

With Oracle Text, you can display a document in different ways. For example, you can present documents with query terms highlighted. Highlighted query terms can be either the words of a word query or the themes of an ABOUT query in English.

You can also obtain gist (document summary) and theme information from documents with the CTX_DOC PL/SQL package.

Table 5-2 describes the different output you can obtain and which procedure to use to obtain each type.

Figure 5-1 shows an original document to which we can apply highlighting, gisting, and theme extraction in the following sections.

• Highlighting Example

• Document List of Themes Example

• Gist Example