MetadataSchemaField - EventBridge - Alibaba Cloud Documentation Center

Parameter	Type	Description	Example
	object	The definition of a single field in the knowledge base metadata schema, including the field name, type, and value mode.
Name	string	The name of the metadata field.	department
Type	string	Valid values: STRING, LONG, DOUBLE, BOOLEAN, and DATETIME. This field is ignored when ValueMode is set to SYSTEM_VARIABLE. The system enforces the inherent type of the bound variable: DOCUMENT_NAME, FILE_TYPE, SOURCE_TYPE, and SOURCE_URI use STRING. FILE_SIZE, DOCUMENT_UPLOAD_TIME, and SOURCE_MODIFIED_TIME use LONG. An incorrect value specified by the user has no effect.	STRING
Value	string	When ValueMode is set to CONSTANT, this field specifies a fixed value. An empty value indicates that the value can be assigned during document upload. When ValueMode is set to SYSTEM_VARIABLE, this field specifies a system variable name. Valid system variable names: DOCUMENT_NAME, FILE_TYPE, FILE_SIZE, DOCUMENT_UPLOAD_TIME, SOURCE_TYPE, SOURCE_URI, and SOURCE_MODIFIED_TIME. The system maintains the values of system variables. For manual uploads, the source is fixed to UPLOAD, and SOURCE_URI and SOURCE_MODIFIED_TIME use the values declared by the user. For event stream imports, the system automatically maintains the values. For example, for an OSS import, the source is OSS, SOURCE_URI is oss://bucket/key, and SOURCE_MODIFIED_TIME is the object modification time.	EventHouse
ValueMode	string	This field is optional. If omitted, the user assigns the value during document upload. Valid values: CONSTANT: The field uses a constant. If Value is not empty, the fixed value is automatically applied to the document. If Value is empty, the value can be assigned during upload. SYSTEM_VARIABLE: The field is bound to a system variable. Value specifies the variable name, and the system automatically populates the value from the document facts. A value explicitly provided by the user during document upload always takes precedence. The backend does not override user-specified values.	CONSTANT

object

The definition of a single field in the knowledge base metadata schema, including the field name, type, and value mode.

Name

string

The name of the metadata field.

department

Type

string

Valid values: STRING, LONG, DOUBLE, BOOLEAN, and DATETIME. This field is ignored when ValueMode is set to SYSTEM_VARIABLE. The system enforces the inherent type of the bound variable: DOCUMENT_NAME, FILE_TYPE, SOURCE_TYPE, and SOURCE_URI use STRING. FILE_SIZE, DOCUMENT_UPLOAD_TIME, and SOURCE_MODIFIED_TIME use LONG. An incorrect value specified by the user has no effect.

STRING

Value

string

When ValueMode is set to CONSTANT, this field specifies a fixed value. An empty value indicates that the value can be assigned during document upload. When ValueMode is set to SYSTEM_VARIABLE, this field specifies a system variable name. Valid system variable names: DOCUMENT_NAME, FILE_TYPE, FILE_SIZE, DOCUMENT_UPLOAD_TIME, SOURCE_TYPE, SOURCE_URI, and SOURCE_MODIFIED_TIME. The system maintains the values of system variables. For manual uploads, the source is fixed to UPLOAD, and SOURCE_URI and SOURCE_MODIFIED_TIME use the values declared by the user. For event stream imports, the system automatically maintains the values. For example, for an OSS import, the source is OSS, SOURCE_URI is oss://bucket/key, and SOURCE_MODIFIED_TIME is the object modification time.

EventHouse

ValueMode

string

This field is optional. If omitted, the user assigns the value during document upload. Valid values:

CONSTANT: The field uses a constant. If Value is not empty, the fixed value is automatically applied to the document. If Value is empty, the value can be assigned during upload.
SYSTEM_VARIABLE: The field is bound to a system variable. Value specifies the variable name, and the system automatically populates the value from the document facts.

A value explicitly provided by the user during document upload always takes precedence. The backend does not override user-specified values.

CONSTANT