Release 2.4
A63819-01
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| Oracle8
ConText Cartridge QuickStart
Release 2.4 A63819-01 |
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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 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 (queries), 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.
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Note: Text viewing is not covered in this manual. For complete details about text viewing, see Oracle8 ConText Cartridge Application Developer's Guide. |
For an explanation of the steps required to set up text queries,
see "Startup and Hot Upgrade" in Chapter
2, "Using Text Queries".
For examples of some basic text queries, see "Text
Queries" in Chapter 2, "Using Text Queries".
For English-language text, ConText provides in-depth linguistic
analysis and output. The linguistic output can be used to create theme
indexes for performing theme queries and theme highlighting.
A theme query retrieves documents based on the main topics
found in the documents in a column. Theme highlighting highlights the paragraphs
that contribute to a theme for a selected document.
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Note: Theme queries are performed in the same way as text queries and support many of the same search options. Theme highlighting is similar to text highlighting and is not covered in this manual. For complete details about theme highlighting, see Oracle8 ConText Cartridge Application Developer's Guide. |
In addition, ConText can be used to generate 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.
For an explanation of the steps required to set up theme
queries and generate linguistic output, see "Startup
and Hot Upgrade" in Chapter 3, "Using Theme
Queries and CTX_LING"
For examples of some basic theme queries and linguistic output
usage, see "Theme Queries" and "Linguistics"
in Chapter 3, "Using Theme Queries and CTX_LING".
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 Linguistics 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
Linguistics.
Before you can perform the QuickStart tasks, 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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