Get IFC schema version

Question

Opening an *.ifc file we can find "File_Schema" in the Header, for example: HEADER; ... FILE_SCHEMA (('IFC4')); ENDSEC;

We are downloading IFC stream file and it would be nice to know the file schema version for it. Is it somehow possible to get this information via DataManagement API?

Answer 1

This is already an old post, but just to mention that for those who download the file before any other operation: once downloaded, the following command can be used (on a Unix-like environment) to get exactly the IFC schema (eg "IFC2X3", "IFC4"):

grep "^FILE_SCHEMA" file.ifc | cut -d"'" -f2

Of course this command can be integrated in a program written in Node.js for example (using childProcess.exec), or any other programming language. Note that this is usually faster than streaming the file and searching in it, or even using a language-specific library to "grep" the file, especially for big IFC files.