How to create UDL with folding similar to INI file?

[Marian Pisarcik]

I am trying to create my own mardown language. I wanted every entry starting with # following title. All next lines should be folded under the entry title:

Expanded:

< Title 1
Desc line one
Desc line two
< Title 2
Desc line one
< Title 3
Desc line one
Desc line two
Desc line three

Collapsed:
< Title 1
< Title 2
< Title 3

I was only able to create folding with < starting and with << ending. I think ending is not necessary. Thanks a lot