The .. is often combined with the attribute axis to find the attribute of the parent node (../@name).
You can use an asterisk as a wildcard within the path.
For example, /*/A would select all the A elements of all of the siblings of the current node.
File: Data.xml
T1
T2
project1
destruction
medicine
3 points
File: Transform.xslt
Output:
T1
T2
T1- project1
- destruction
medicine
3 points