Recently, there was a question on the forums at OpenXMLDeveloper.org: How do you draw a horizontal line below a paragraph. I used this question as the focus for a 11 minute video on the general approach that I use to research Open XML markup. The approach that I take is:
- Create two documents, one without the feature of interest, and the other with. I then compare the two documents using the Open XML SDK productivity tool.
- After seeing the differences in markup, I often open the document with the feature using the Open XML Package Editor Power Tool for Visual Studio 2010.
- When examining the Open XML standard, I most often use the PDF version of the ECMA-376 2nd Edition Part 1. The PDF provides the most convenient way to navigate through the standard.