The following from the DLF Aquifer Guidelines caused some confusion at our institution:
Specify authority at the <subject> level in most cases (exceptions are <subject><name>, <subject><titleInfo>, and <subject><geographicCode>). If providing subjects from different authorities, use a separate <subject> element for each. This is required even when subjects differ only at the subelement level. –p.55
Initially we took this to mean that if a <subject> element had a <name> sub-element, then the <subject> element should not get an authority attribute at all. The authority attribute should appear only at the <name> level.
However, the DLF Aquifer examples are including the authority attribute at both the name and the subject levels:
<name type="personal" authority="naf">
<topic>Criticism and interpretation</topic>
What do other institutions do? Code the authorities at both the subject and name level?
Another thought, if you are recording values in a string, rather than parsed into name, title, and topic sub-elements?
Thanks and Happy New Year.