Today I want to return to a question I answered a few months ago on finding the appropriate level of granularity in an index. Within that question was the comment, “too many subheadings with the same locator is a red flag.” That comment has stuck with me.

It is true that common indexing wisdom is to avoid repeating locators within an array. Repetition, with locators duplicated across subheadings, can bloat an index. An array may be difficult to read, or confusing to readers, if there are too many similar subheadings side-by-side. If there is a strict length limit, there may also not be enough space for duplication.

And yet, as with many conventions in indexing, “it depends.” I recently wrote an index in which I did consider repeating locators within an array. I think it is worth teasing out why this may sometimes be appropriate.

Framing Discussions

To start, it is important to recognize that discussions can be framed multiple ways. This affects how subheadings are phrased.

One option is to state the literal concept, object, organization, or person that is being discussed. For the book I recently indexed, which was about Anglican Church leaders and fertility-manipulation schemes during the interwar period, this could be something like,

birth control: Anglican leaders on

This tells the reader who is commenting (Anglican leaders) and what they are commenting on (birth control), but it does not tell us anything about the substance of the discussion.

Another approach is thematic, to focus on that substance. For example,

birth control: class and; empire and

These two approaches can also be combined, though such subheadings can become unwieldy and each element of the subheading may not appear on every page. For example,

birth control: and Anglican leaders’ concerns about class and empire 

My point here is not to advocate for one framing over another. I use different approaches, often within the same index. It depends on what I think it most relevant for the reader and the array. To cut down on length and to keep arrays succinct, it often helps to pick a single frame. As is oft said, the goal is to point readers to the information, not to rewrite the text.

Other times, however, it may make sense to include multiple frames—multiple subheadings—because the different frames carry equal weight and because the discussions—and locators—while overlapping, are also distinct. This can help tease out the different elements, especially when discussions are complicated and intertwined. So, something like,

birth control: Anglican leaders on; class and; empire and

Alternate Entry Points

An alternative to having parallel subheadings and duplicate locators within an array is to create entry points elsewhere. Perhaps there is not enough space in the birth control array to include subheadings for class and empire, but those can both be (and should be) main entries in their own right. When considering the different elements of a discussion, and the different ways a discussion can be framed, think about what other headings and subheadings can be created elsewhere. An index is the perfect place to deconstruct and scatter discussions.

Multiple Discussions Per Page

It may also happen that a single page contains multiple distinct discussions. This is especially true the more words there are per page, depending on how the book has been typeset. If this is the case, then index to the discussions. Don’t worry if locators are duplicated. 

The trick here is distinguishing what is truly a distinct discussion or fact, rather than a granular subset of the same discussion. Does the discussion still hold together when you telescope out?

Focus on the Story

Lastly, consider the story that the array needs to tell. What is it, about this subject, that is important for the reader to know? This is not about rewriting the book in the index, but rather about effectively pointing readers in the right direction. Having a focus is also relevant for space, both because space for the index may be limited and in the sense that a succinct array is easier to scan. 

This also comes back to framing. What is the most effective frame for readers to recognize what they are seeking? As mentioned, often a single frame is sufficient, focusing on whatever is most relevant. In other instances, it may be better to include multiple frames if they hold equal weight. Either way, test the subheading(s) against the larger story or point that the book is making about that topic. 

 

Repeating locators within an array, across two or more subheadings, is usually a question of how that information is being framed. It is often best to avoid duplication, to avoid similar, parallel subheadings or an array that is too long. In other instances, in which discussions are complicated with intertwined subjects and themes, parallel subheadings may be justified. It is a matter of seeing the whole story that needs to be conveyed, and then deciding the best way to point readers towards that story. As with so much when indexing, it is less a question of right or wrong, and more a matter of weighing the relative merits and applicability of different approaches.