ADD_ATTR_SECTION

Adds an attribute section to an XML section group. This procedure is useful for defining attributes in XML documents as sections. This allows you to search XML attribute text with the WITHIN operator.

Syntax

CTX_DDL.ADD_ATTR_SECTION(
  group_name     in    varchar2,
  section_name   in    varchar2,
  tag            in    varchar2);

group_name

Specify the name of the XML section group.

section_name

Specify the name of the attribute section. This is the name used for WITHIN queries on the attribute text.

The section name you specify cannot contain the colon (:) or dot (.) characters. The section name must also be unique within group_name. Section names are case-insensitive.

Attribute section names can be no more than 64 bytes long.

tag

Specify the name of the attribute in tag@attr form. This parameter is case-sensitive.

Examples

Consider an XML file that defines the BOOK tag with a TITLE attribute as follows:

<BOOK TITLE="Tale of Two Cities"> 
  It was the best of times. 
</BOOK> 

To define the title attribute as an attribute section, create an XML_SECTION_GROUP and define the attribute section as follows:

ctx_ddl_create_section_group('myxmlgroup', 'XML_SECTION_GROUP');
ctx_ddl.add_attr_section('myxmlgroup', 'booktitle', 'book@title');
end;

When you define the TITLE attribute section as such and index the document set, you can query the XML attribute text as follows:

'Cities within booktitle'

Notes

You can add attribute sections only to XML section groups.

When you use AUTO_SECTION_GROUP, attribute sections are created automatically. Attribute sections created automatically are named in the form tag@attribute.