Release 2.0
A54627_01
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| Oracle8 ConText Cartridge QuickStart Release 2.0 A54627_01 |
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This chapter introduces Oracle8 ConText Cartridge and the QuickStart process, and describes the requirements for enabling ConText to store and retrieve text.
The following topics are covered in this chapter:
Oracle8 ConText Cartridge provides powerful search, retrieval, and viewing capabilities for text stored in an Oracle8 database. In addition, ConText provides advanced linguistic processing of English-language text.
These capabilities are implemented in Oracle8 using ConText server processes that complement the Oracle 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:
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, and stored queries.
Text viewing capabilities include WYSIWIG and plain text viewing of selected documents, as well as highlighting of query terms.
| Note:
Text viewing is not covered in this manual. For complete details about text viewing, see Oracle8 ConText Cartridge Application Developer's Guide. |
If your documents consist of English-language text, ConText provides in-depth linguistic analysis of your text. The output from this linguistic processing can be used to perform theme queries, which retrieve documents based on the main topics and concepts found in the documents.
In addition, ConText provides linguistic processing for individual documents in the form of Linguistic Services. The Linguistic Services produce output which can be used to provide advanced document viewing capabilities such as lists of themes and text summaries called Gists.
| Note:
Theme queries are performed in the same way as text queries and support many of the same search options. |
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 Linguistic Services in ConText.
Before you can perform QuickStart, Oracle8 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".
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).
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.
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