Test for the presence literature references in the form of DOIs

[ChristianLieven]

Problem description

Having annotations in the form of cross-references is helpful and confidence scores are certainly a great way of quantifying how trust-worthy a certain item in a GEM is, but the ultimate measure would be how many of X items can be backed up with actual literature.

Being able to solve this issue relies heavily on the outcome of this https://github.com/opencobra/schema i.e. how DOIs will be handled within SBML in the future.

Code Sample

• (Test confidence score 3 and 4 reactions for presence of DOI (or better Pubmed ID) in annotation dict)?
• (Test number of included DOI (or better Pubmed ID) == number of reactions as a score for manual curation)?

[ChristianLieven]

Blocked by opencobra/cobrapy#622