Identify the rows of subrecords in a tidyged object
A tidyged object.
The level of the first line of the subrecord.
The accepted tags of the first line of the subrecord.
The accepted values of the first line of the subrecord.
The xrefs of records containing the subrecord (default is all records).
Whether to return only the first match found or to return all matches.
A vector of rows in the tidyged object of the subrecord(s).