Extensions Practical Guide

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The modifierId attribute is a SCTID which specifies the type of description logic that applies to the given relationship - existential restriction (i.e. 'there exists some') or universal restriction (i.e. 'there exists only'). All relationships in the International Edition use the value 

Concept
ShowPartsterm
t900000000000451002 |Existential restriction modifier|
. This value is also recommended for extension relationships, as the value 
Concept
ShowPartsterm
t900000000000452009 |Universal restriction modifier|
 can significantly affect the speed of classification.

Example

In  belowIn 

Caption reference
CapRefIdadding-rows-to-the-relationships-table
CapRefTypeFigure
 below, two rows from the relationship table of the 20170901 US edition are shown. Note that these relationships are used to define the extension concept from the earlier example.

Caption label
CapIdadding-rows-to-the-relationships-table
CapTypeFigure
Rows from the relationship table in the 20170901 US Edition

Please note the following:

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