ISATAB serialization: effect of presence/absence to "Term Source REF" "Term Accession" on parsing

[proccaserra]

Source Name | Characteristics | Sample Name and Source Name | Characteristics | Term Accession Number | Term Source REF | Sample Name

• Will be serialised differently in JSON with characteristics.value being output as str() or OntologyAnnotation() respectively.
• Affects round-tripping expectations

Documentation is needed to fully qualify this aspect and good practices for producing ISA-Tab (ISA JSON) documents.