If you want to use this library for developing OPC UA models in draw.io, simply import this library in draw.io by
File >> Open Library >> "Browse to file OPC-UA-specifications.xml"
This will create a pellet of OPC UA specifications at the left side, from which you can drag and drop the shapes.
Draw.io does not provide double head arrow ends, so HasTypeDefinition and HasSubType reference types connectors could not be developed. I have provided two triangles that can be placed on top of the connectors in the final models.
Once you open the library in draw.io, you can also update it by editing the shaping and raging them back to the pellet. Save to .xml file, once you update your library.