collect(group,attribute)
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| A Tinderbox Reference File : Actions & Rules : Operators : Action Operator Scope : Group-based operators : collect(group,attribute) | aTbRef Site Map |
collect(group,attribute) |
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| Operator Type: | Set creation |
| Operator Scope of Action: | Group |
A function collect() builds sets. (See collect_if() for a related new operator)
collect(where,attribute)
builds a set by visiting each note described by where and adding the value of the designated attribute to the set.
where may be any of {child,descendent,sibling,ancestor,all}. In addition, where may be argument that designates a particular (single) note other than this.
what can be any expression, but is typically an attribute.
For example,
collect(child,$Name)
constructs a set with the name of each child of the note.
For example,
collect(child(/agents/books),$Name)
does the same for children of the note 'books' inside 'agents'.
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