Unable to parse .owl file due to whitespace handling.

[alex]

Hi,

I have an Ontology file created by a non public available third party lib and the "print_classes" example app crashes with the error:

.../include/owlcpp/rdf/node_literal.hpp(53): Throw in function static >owlcpp::detail::Node_literal_impl< <template-parameter-1-1> >::value_type >owlcpp::detail::Node_literal_impl< <template-parameter-1-1> >::convert(const In&, >owlcpp::Node_id) [with In = std::basic_string<char>; Dt = owlcpp::detail::Datatype_int; >owlcpp::detail::Node_literal_impl< <template-parameter-1-1> >::value_type = long int]
Dynamic exception type: N5boost16exception_detail10clone_implIN6owlcpp7Rdf_errEEE
std::exception::what: std::exception
[PN6owlcpp13errinfo_str1_E] = "0
"
[PN6owlcpp16errinfo_message_E] = error converting to xsd:int

As the output shows the error is due to the additional whitespaces and the line break after the 0.
The xml for that case looks like this:

        <ds:TranslationX rdf:datatype="&xsd;int" >0
        </ds:TranslationX>

I couldn't find a reference if this spacing is illegal in owl or if it is a bug in the library.
The sourceforge markdown seems to delete the leading whitespaces so before the single " in the error are two tabs and before the two <ds/ds definitions are two tabs too.

Thanks in advance for clarification.

Alexander

[M Levin]

Hi Alexander,

XML Schema sets facet whiteSpace=collapse for booleans and decimals. #x9 (tab), #xA (line feed), #xD (carriage return), and #x20 (space) should be stripped from both ends.
http://www.w3.org/TR/2012/REC-xmlschema11-2-20120405/#decimal
Therefore your example is legal.

I have pushed a fix for this issue. It is in the master branch. Please check it out.

Thanks for catching!

Mikhail

[alex]

Thanks, with the new version from the master branch the ontology loads correctly.