Release 9.2
 Home |
 Book List |
 Contents |
 Master Index |
 Feedback |
| Oracle Ultra Search Online Documentation Release 9.2 |
|
 |
Related Topics |  |
 |
 |
|
When your indexed documents contain metadata, such as author and date information, you can let users refine their searches based on this information. For example, users can search for all documents where the author attribute has a certain value.
The list of values (LOV) for a document attribute can help specify a search query. An attribute value can have a display name for it. For example, the attribute country might use country code as the attribute value, but show the name of the country to the user. There could be multiple translations of the attribute display name
To define a search attribute, use the Search Attributes subtab. Ultra Search provides some system-defined attributes, such as "Author" and "Description." You can also define your own.
After defining search attributes, you must map between document attributes and global search attributes for data sources. To do so, use the Mappings subtab.
Note: Ultra Search provides a command-line tool to load metadata, such as search attribute LOVs and display names, into an Ultra Search database. If you have a large amount of data, this is probably faster than using the HTML-based administration tool. For more information, see Loading Metadata into Ultrasearch.
Search attributes are attributes exposed to the query user. Oracle Ultra Search provides system-defined attributes, such as "Author" and "Description." Ultra Search maintains a global list of search attributes. You can add, edit, or delete search attributes. You can also click Manage LOV to change the list of values (LOV) for the search attribute. There are two categories of attribute LOVs: one is global across all data sources, the other is data source-specific.
To define your own attribute, enter the name of the attribute in the text box; select string, date, or number; and click Add.
You can add or delete LOV entry and display name for search attributes. Display name is optional. If display name is absent, then LOV entry is used in the query screen.
Note: LOV is only represented as string type. If LOV is in date format, then you must use "DD-MM-YYYY" to enter the LOV.
Update Policy
A data source-specific LOV can be updated in three ways:
- Manually
- The crawler agent can automatically update the LOV during the crawling process
- New LOV entries can be automatically added by inspecting attribute values of incoming documents
Caution: If the update policy is agent-controlled, then the LOV and all translated values are erased in the next crawling.
This section displays mapping information for user-defined sources. Mapping is done at the agent level, and document attributes are automatically mapped to search attributes with the same name initially. Document attributes and search attributes are mapped one-to-one. For each user-defined data source, you can edit which global search attribute the document attribute is mapped to.
For Web or table data sources, mappings are created manually when you create the data source. For user-defined data sources, mappings are automatically created on subsequent crawls.
Click Edit mappings to change this mapping.
Editing the existing mapping is costly, because the crawler must recrawl all documents for this data source. You should avoid this step, unless necessary.
Note: After you define a search attribute mapping, you cannot remove that mapping.
Note: There are no user-managed mappings for email sources. There are two predefined mappings for emails. The "From" field of an email is intrinsically mapped to the Ultra Search "Author" attribute. Likewise, the "Subject" field of an email is mapped to the Ultra Search "Subject" attribute. The abstract of the email message is mapped to the "Description" attribute.
 Copyright © 2002 Oracle Corporation. All Rights Reserved. |
|