Metadata Views for Semantic Indexing

5.16 Metadata Views for Semantic Indexing

This section describes views that contain metadata about semantic indexing

Parent topic: Semantic Indexing for Documents

5.16.1 RDFCTX_POLICIES View

Information about extractor policies defined in the current schema is maintained in the RDFCTX_POLICIES view, which has the columns shown in Table 5-1 and one row for each extractor policy.

Table 5-1 RDFCTX_POLICIES View Columns

Column Name	Data Type	Description
POLICY_OWNER	VARCHAR2(32)	Owner of the extractor policy
POLICY_NAME	VARCHAR2(32)	Name of the extractor policy
EXTRACTOR	MDSYS.RDFCTX_EXTRACTOR	Instance of extractor type
IS_DEPENDENT	VARCHAR2(3)	Contains `YES` if the extractor policy is dependent on a base policy; contains `NO` if the extractor policy is not dependent on a base policy.
BASE_POLICY	VARCHAR2(32)	For a dependent policy, the name of the base policy
USER_MODELS	SEM_MODELS	For a dependent policy, a list of the RDF graphs included in the policy

Parent topic: Metadata Views for Semantic Indexing

5.16.2 RDFCTX_INDEX_POLICIES View

Information about semantic indexes defined in the current schema and the extractor policies used to create the index is maintained in the RDFCTX_POLICIES view, which has the columns shown in Table 5-2 and one row for each combination of semantic index and extractor policy.

Table 5-2 RDFCTX_INDEX_POLICIES View Columns

Column Name	Data Type	Description
INDEX_OWNER	VARCHAR2(32)	Owner of the semantic index
INDEX_NAME	VARCHAR2(32)	Name of the semantic index
INDEX_PARTITION	VARCHAR2(32)	Name of the index partition (for LOCAL index only)
POLICY_NAME	VARCHAR2(32)	Name of the extractor policy
EXTR_PARAMETERS	VARCHAR2(100)	Parameters specified for the extractor
IS_DEFAULT	VARCHAR2(3)	Contains `YES` if POLICY_NAME is the default extractor policy for the index; contains `NO` if POLICY_NAME is not the default extractor policy for the index.
STATUS	VARCHAR2(10)	Contains `VALID` if the index is valid, `INPROGRESS` if the index is being created, or `FAILED` if a system failure occurred during the creation of the index.
RDF_MODEL	VARCHAR2(32)	Name of the RDF graph maintaining the index data

Parent topic: Metadata Views for Semantic Indexing

5.16.3 RDFCTX_INDEX_EXCEPTIONS View

Information about exceptions encountered while creating or maintaining semantic indexes in the current schema is maintained in the RDFCTX_INDEX_EXCEPTIONS view, which has the columns shown in Table 5-3 and one row for each exception.

Table 5-3 RDFCTX_INDEX_EXCEPTIONS View Columns

Column Name	Data Type	Description
INDEX_OWNER	VARCHAR2(32)	Owner of the semantic index associated with the exception
INDEX_NAME	VARCHAR2(32)	Name of the semantic index associated with the exception
POLICY_NAME	VARCHAR2(32)	Name of the extractor policy associated with the exception
DOC_IDENTIFIER	VARCHAR2(38)	Row identifier (rowid) of the document associated with the exception
EXCEPTION_TYPE	VARCHAR2(13)	Type of exception
EXCEPTION_CODE	NUMBER	Error code associated with the exception
EXCEPTION_TEXT	CLOB	Text associated with the exception
EXTRACTED_AT	TIMESTAMP	Time at which the exception occurred

Parent topic: Metadata Views for Semantic Indexing