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/** Look up feature name, which may be simple feature or path.
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/** Look up feature name, which may be simple feature or path,
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returning <parameter>def</paramater> if not found
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{ return val_path(path,def); }
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/**@name Access functions which return types.
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int, string or features (A). In all cases the name can be a
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simple feature or a path, in which case their name is a dot
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separated string of concatenated attributes