Oracle ConText Option QuickStart, Release 2.3 Go to Product Documentation Library
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Introduction


This chapter introduces Oracle ConText Option and the QuickStart process, and describes the requirements for enabling ConText to store and retrieve text.

The following topics are covered in this chapter:

What is Oracle ConText Option?

Oracle ConText Option provides powerful search, retrieval, and viewing capabilities for text stored in an Oracle7 database. In addition, ConText provides advanced linguistic processing of English-language text.

These capabilities are implemented in Oracle7 using ConText server processes and ConText indexes for each database column in which text is stored.

With ConText, you can use SQL and PL/SQL to incorporate advanced text and linguistic functionality into new or existing applications:

Text Processing

ConText provides advanced text searching and viewing functionality, such as full text retrieval, relevance ranking, and query term highlighting.

Text queries support a wide range of search options, including: logical operators (AND, OR, NOT, etc.), proximity searches, thesaural expansion, section searches, and stored queries.

Text viewing capabilities include WYSIWIG and plain text viewing of documents, as well as highlighting of query terms


Note:

Text viewing is not covered in this manual. For complete details about text viewing, see Oracle ConText Option Application Developer's Guide.

 

Linguistic Processing

For English-language text, ConText provides in-depth linguistic analysis. The linguistic analysis output can be used to perform theme queries. A theme query retrieves documents based on the main topics found in the documents in a column.


Note:

Theme queries are performed in the same way as text queries and support many of the same search options.

 

In addition, ConText provides Linguistic Services for generating linguistic output for individual documents. The output can be used to provide advanced document viewing capabilities such as lists of themes, theme summaries, and document Gists.

What is QuickStart?

Before text and theme query functionality can be integrated into an application, the database columns used to store text must be defined as text columns and text/theme indexes must be created for the columns.

In addition, if you want to incorporate theme lists and Gists into your English-language text applications, the Linguistic Services must be called to generate linguistic output for your documents and the output must be stored in database tables.

QuickStart provides step-by-step instructions for quickly and easily performing these tasks. Once the QuickStart tasks have been performed, your system is text-enabled for text/theme queries and viewing linguistic output.

QuickStart also provides examples of text and theme queries, as well as examples of queries that use the output generated by the ConText Linguistic Services.

QuickStart Requirements

Before you can perform the QuickStart tasks, Oracle7 and ConText must be installed and the ConText implementation tasks must be completed. In addition, QuickStart is easiest to perform when text is already stored in the database.

If the required installation and implementation tasks have not been completed, see Chapter 4, "Implementing ConText".

Oracle Users and Tables

This QuickStart manual presents an example Oracle user named ctxdev and an example text table named docs. Ctxdev and docs are used in all QuickStart examples; however, they are used for illustration purposes only and are not provided by ConText.

To perform QuickStart, you can use an existing Oracle user and table or you can create a user and table (i.e. ctxdev and docs).

ConText Defaults

QuickStart assumes the following conditions for your text and uses the appropriate defaults in ConText:

If these conditions are not valid for your setup, QuickStart can still be performed; however, you cannot use the defaults in ConText and must specify settings that match your setup.

See Also:

Oracle ConText Option Administrator's Guide

 




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