EXTRACT_NAME
- Last Updated: May 13, 2026
- 1 minute read
- Semaphore
- Documentation
Defines a name for the evidence of the current rule which may then be extracted with a parent rule using the EXTRACT attribute.
When an EXPRESSION rule has this attribute then the evidence captured will be the normalised form of the evidence (if the zoner applies normalisation). This is normally the behaviour you would want so if, for example, a date zone is named then the extracted evidence would be the date in ISO 8601 format. If you want the raw evidence then use the EXTRACT_EVIDENCE attribute instead.
Applies to
No restriction on which rule it may be applied to. However a rule with the EXTRACT attribute set is required to extract this, or some subset of, named evidence.
Values
- “XXXX” - XXXX is the name of the evidence when extracted
Other attributes having special meaning for any rule with this attribute
Example
The following document:
Jean-Claude Trichet announced today a rise of 1/2 point in interest rates.
In a separate intervention the governor of the European Central Bank announced that the
institution will keep a firm handle on inflation.
Evaluated against the following rulebase fragment:
<expression extract="1" type="PERSON" extract_name="person" />
Will return:
....
<META name="person" value="Jean-Claude Trichet" score="1.00"/>
....
In this example the EXTRACT attribute is set on the same rule as the name. Often this would be on another rule further up the tree.