[Feature Request] Add funding, acknolwledgement and license to isa.xlsx files

[andreaschrader]

Is your feature request related to a problem? Please describe.
While mapping and repeatedly having added funding, acknowledgement and license to the README in the root of several ARC, we feel that this is missing in the isa.xlsx:

Describe the solution you'd like
We suggest to add the following as comments to isa.xlsx:

• funding_statement
• funding_id
• funder
• license
• acknowledgement

[kMutagene]

@HLWeil if we decide to make the ARC a true extension of the ISA format, this should be real investigation metadata fields, not comments (in our standard) IMO. When doing ISA export, we can add them as comment. I think just using comments for everything that has no field in ISA is an unsustainable way moving forward

[HLWeil]

@andreaschrader @kMutagene this is an important, but difficult topic.

I see the need to include this information. But I think it won't stop there and conversions to other formats or checklists have the same constraints, with the Comment being currently used as a fall-back. This might lead to an ever growing amount of fixed fields in the specification.

Maybe another possible solution could be taking a similar route as with the Processes, using Key-Value pairs stemming from a controlled vocabulary. I think this would be the most logically consistent with the general philosophy of keeping it as generalizable as possible.

But there might be some technical constraints:

• How could you integrate this in the current ISA-XLSX?
• Is there a way to attach these Key-Value pairs as PropertyValues in the ARC RO-Crate?