Part 6: Subheadings

A. Including all subheadings

When an indexer assigns a Subject Heading, she often (but not always) also assigns a "subheading", because the article is about a particular aspect of a topic. For example, here's how a few articles about TMJ disorders were indexed:

In the last section, we searched for articles on TMJ disorders, and after exploding the Subject Heading Temporomandibular Joint Disorders, Ovid asked whether we wanted to include all subheadings:

Subheadings for: exp Temporomandibular Joint Disorders

We said yes by checking the "Include All" box:

Subheadings for: exp Temporomandibular Joint Disorders

This is the best approach if you want all the articles on TMJ disorders. You'll get articles where Temporomandibular Joint Disorders has no subheading , and articles where it has any particular subheading.

But we could have checked one (or more) subheadings, instead.

Part 6: Subheadings (continued)
B.  Choosing one subheading

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