Extract additional metadata

[althonos]

Two more parameters could be extracted: postAcquisitionSolventSuppressionMethod and calibrationCompound

<postAcquisitionSolventSuppressionMethod cvRef="NCIThesaurus" accession="C19377" name="Not Defined"/>
<calibrationCompound cvRef="NCIThesaurus" accession="C19377" name="Not Defined"/>

[proccaserra]

@althonos sounds good, one comment:

NMRML-CV has "postAcquisitionSolventSuppression" NMR:1400108 (a subclass of process/data transformation

NMRML-CV has 'calibration compound" (NMR:1400032)

that would catter to specificity and remove the ambiguity caused by reliance on NCIT C19377

best

[althonos]

Okay, I'll find a way to replace the NCIT CV ref on these two terms.