EXTRACT_GROUP
- Last Updated: May 13, 2026
- 1 minute read
- Semaphore
- Documentation
When the EXTRACT_GROUP attribute is set the rule will group any extracted evidence from its child rules using the evidence grouping applicable for the rule and pass the group up for possible extraction to a parent rule with the EXTRACT attribute set.
Applies to
No restriction on which rule it may be applied to.
Values
- “XXXX” - XXXX is the name of the grouping 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:
<sentence extract="1" extract_group="group" >
<expression type="PERSON" extract_name="person" />
<text data="{V}" extract_name="action" />
<text data="{N} {N}" extract_name="noun_group" />
</sentence>
Will return:
....
<META name="group" value="" score="1.00">
<META name="action" value="announced" score="1.00"/>
<META name="noun_group" value="interest rates" score="1.00"/>
<META name="person" value="Jean-Claude Trichet" score="1.00"/>
</META>
....
In this case the grouping is done per sentence - typically sentence / paragraph rules are used to group but other rules may be used if the grouping makes sense