I want to extend formProperty, add attribute for it, but i do not know how

for example:

Thanks for any guidance

Hey @listen-lee,

What is your use case? Where are you using that property? The BPMN XML uses the FormPropertyParser to parse the form properties and StartEventXMLConverter#writeFormProperties and UserTaskXMLConverter#writeFormProperties to write from the BPMNModel to XML.

Cheers,
Filip