Contents > 8 Defining Custom Design Metrics and Rules > 8.2 Definition of Sets > 8.2.1 Projection > 8.2.1.3 Attribute "exclude_self"
8.2.1.3 Attribute "exclude_self"
The attribute exclude_self can take the values "true" or
"false" (default).
When exclude_self is set to true, the element for which the
set is calculated is not included in the result set. For example,
assume we want to determine, for a state in a state diagram, the set
of states that can be reached from that state:
<set name="Reachable_States" domain="state">
<description>The set of reachable states.</description>
<projection relation="transsource" target="transition"
element="transtarget" eltype="state"
recurse="true" exclude_self="true" />
</set>
By setting exclude_self to true, the state for which the set
is calculated is not included in the result set, even if the
state-transition graph has loops back to the state.
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| Section 8.2.1.2 "Attribute "set"" | Contents | Section 8.2.1.4 "Attribute "valueset"" |