filep_entity_names
filep_entity_names (arr[, doc])
The filep_entity_names function fills the array arr with an alphabetical list of file parameter entity names which are valid for the current document, returning the total number. The first name returned is stored at index 1. All previous elements in arr are discarded.
The doc argument specifies the identifier of the document tree to query. If omitted or 0, the current document is used.
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Only entities declared in the declaration subset are included in the array arr.
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