# XMLmind XML Editor - Online Help

### 8.2. How to open a document set in XXE?

Use File → Document Set → Open Document Set to let XXE know about a given document set. This menu item displays a dialog box allowing to choose the file specifying the document set.

- If the selected file is a DITA map, then the members of the document set are the topics referenced in this map. See Figure 7.1, “A document set specified by a DITA map and 3 topic members opened in XXE” below.

- If the selected file is a master DocBook document (for example a modular book including a number of chapters, each chapter being found in its own XML file), then the members of the document set are the DocBook documents included in this master document. See Figure 7.2, “A document set specified by a modular DocBook book and 3 chapter or section members opened in XXE” below.

- In all other cases, the content of the selected file is not analyzed by XXE. Instead, the selected file specifies a directory and a filename extension. For example, selecting file `file:/home/john/site/buy.html` specifies the "`file:/home/john/site/*.html`" glob pattern. In this example, the members of the document set are all the files found in directory `file:/home/john/site/` having an "`html`" extension. See Figure 7.3, “A document set specified by a glob pattern and 3 XHTML page members opened in XXE” below.

Figure 7.1. A document set specified by a DITA map and 3 topic members opened in XXE

Figure 7.2. A document set specified by a modular DocBook book and 3 chapter or section members opened in XXE

Figure 7.3. A document set specified by a glob pattern and 3 XHTML page members opened in XXE