SAP Portal - Use Properties in XML Form

I found almost zero documents on this subject. I figured it out finally with some common sense and some luck.

I configured some predefined properties to my KM documents. After it, I needed to create a XML form and use these properties for users to create such documents.

Here is what I had done.

1. Open an existing News form and save as my own project, called FM_News.
2. At the left side, select the Data Model, right click on Properties and select Reload Properties
3. At the editor area, add a label ABC, add three check boxes A, B, and C
4. Add a label DE, add two radio boxes, D and E
5. Define A - Caption A, Name ABC, Value A, Property Reference /Properties/default:ABC
6. Define B - Caption B, Name ABC, Value B, Property Reference /Properties/default:ABC
7. Define C - Caption C, Name ABC, Value C, Property Reference /Properties/default:ABC
8. Define D - Caption D, Name DE, Value D, Property Reference /Properties/default:DE
9. Define E - Caption E, Name DE, Value E, Property Reference /Properties/default:DE
10. Note: check box for multiple selection and radio box for single selection, XML Form Builder may warn you to use Combo Box instead, ignore it.
11. Save and generate.