Regarding Datamaps

[feserm]

Currently trying to use the datamap concept to annotate the datafile of my assay. The dataset is about a phenotyping experiment annotated compliant to MIAPPE. In MIAPPE there is a Trait Definition File (tdf), which also provides metadata about the recorded traits (aka observation variables). I understood the datamap that it sort of would replace the tdf. However, I can't figure out how to extend the datamap in the ARCitect. Further, it seems that I can't extend the datamap in Excel by myself. The new columns are not displayed in the ARCitect.

[Freymaurer]

@HLWeil maybe you can give more insight on this

[HLWeil]

Hey @feserm, thanks for your input. Currently the Datamap is specified with fixed columns.

How did you try to extend the table? Adding Parameter columns like in Assay/Study annotation tables?

[feserm]

I tried to simply add it as a new Column called "Scale". When it did not work, I tried to add it as a Parameter (comparable to unit). With the Link into the Specs, I now tried Comment[Scale], but it also is not displayed in ARCitect.
The Datamap sheet isa_datamap in the isa.assay.xlsx file looks like this:

Data	Data Format	Data Selector Format	Explication	Term Source REF	Term Accession Number	Unit	Term Source REF	Term Accession Number	Object Type	Term Source REF	Term Accession Number	Description	Generated By	Comment[Scale]
df.tsv#cell=2,4-996,4	text/tab-separated-values	https://datatracker.ietf.org/doc/html/rfc7111	SPIKE_LENGTH			centimeter	UO	UO:0000015	Float	NCIT	NCIT:C48150
df.tsv#cell=997,4-1991,4	text/tab-seperated-values	https://datatracker.ietf.org/doc/html/rfc7111	RACHILLA_HAIRS						Integer	NCIT	NCIT:C45255			1:long;2:short