Produce more informative errors messages when owlapi fails to parse manchester

[ramonawalls]

I have a pattern with 7 variables and an input file with 242 rows. When I try to run the file through dosdp-tools generate, I get an error message

An unchecked error was produced.
org.semanticweb.owlapi.manchestersyntax.renderer.ParserException: Encountered 'age category' at line 1 column 76. Expected one of:
	Class name
	(
	{
	Self

However, I know for sure 'age category' is a class. If I take the first 25 rows of the same file and run the tool, it works fine, so the age category label is not the problem. I am wondering if it could be throwing a strange error because the file is so large it times out. Even with only 25 rows, it takes several minutes to process.

[ramonawalls]

Nevermind. Of course I stared at this for three days and found the problem right after submitting this ticket. It turns out that one of the rows much lower down had the variable ID and variable name switch. Fixing that solved the problem.

Perhaps the error message could be updated, though. "Encountered 'age category' at line 1 column 76." suggests that the problem was in the first row, when in fact it was in a much later row.

[dosumis]

The error message comes from the Manchester syntax parser and indicates an unknown OWL entity: the error is at line 1 column 76 of an OWL class expression - presumably your templated EquivalentTo statement. It may be possible to wrap the error message to indicate this context and to indicate the line in the table being processed that causes the problem.

• @balhoff - do you think this would be straightforward to implement?
• If so - @hkir-dev would you be able to look in to fixing?
• @ramonawalls - could you post the broken example somewhere?

[balhoff]

I made some major changes to how expressions are parsed and when the substitutions are made. So this may work better in the next release.