---
title: p.book.category
description: "## Syntax **p.book.category**   ## Purpose The p.book.category annotation is used to tag an element as being part of a group of related books within a book’s metadata. This annotation creates a marker used by search tools to establish relevance…"
url: "https://www.stilo.com/docs/migrate/book/p-book-category/"
updated: "2023-12-04"
category: Annotations / Book, Map and Bookmap
tags:
  - Annotations
---

# p.book.category

## Syntax

**p.book.category**

 

## Purpose

The p.book.category annotation is used to tag an element as being part of a group of related books within a book’s metadata. This annotation creates a marker used by search tools to establish relevance to a subject. Multiple categories may be assigned to a book. This annotation applies a tag which adds the element to the DITA bookmap’s metadata.

## Examples

The following is an example of a time where you might want to use the p.book.category annotation:

![](https://www.stilo.com/wp-content/uploads/2023/10/stilo-dita-xml-annotation-p.book_.category0-235x300.png)

*Note: the relevant paragraph has been marked in bold for this example. The paragraph is not bold in the source document.*

The following is an example of a rule that will apply p.book.category :

![](https://www.stilo.com/wp-content/uploads/2023/10/stilo-dita-xml-annotation-p.book_.category1.png)

The following is the DITA XML output for the previous rule (relevant portion in bold):

 

<category>User Manuals</category>

<category>Software Documentation</category>

````