PROV-N serialization of wasInfluenced by includes an unnecessary "-"

[nicholsn]

In the example below the PROV-N serialization of the wasInfluencedBy relation includes a "-".

In [1]: import prov.model as prov
In [2]: g = prov.ProvBundle()
In [3]: g.entity("e1")
Out[3]: <prov.model.ProvEntity at 0x101f2d550>
In [4]: g.entity("e2")
Out[4]: <prov.model.ProvEntity at 0x101f2d810>
In [5]: g.wasInfluencedBy("e1","e2")
Out[5]: <prov.model.ProvInfluence at 0x101f2d9d0>
In [6]: print g
document

  entity(e1)
  entity(e2)
  wasInfluencedBy(e1, e2, -)
endDocument

Based on the PROV-DM examples for this relation at http://www.w3.org/TR/prov-dm/#dfn-wasinfluencedby, it appears that this "-" is unnecessary.

The issue arrises when using the ProvToolbox to convert this PROV-N to RDF.

PROVCONVERT code says:
TestPreProcessSHORT_FilledInJobRECURSIVE.provn line 256:54 mismatched input '-' expecting OPEN_SQUARE_BRACE

If I go through the PROVN file and remove the ,- (comma-dashes) then there is no problem. The same dashes are there for the "USED" function but the PROVCONVERT program has no problem with them.

Is this a bug in the PROV Python library or ProvToolbox?

[trungdong]

Hi @nicholsn,

Thank you for spotting out the bug. There used to be an optional 'activity' attribute in Influence expressions, but this is no longer the case. I've just pushed a commit that fixes this.

[nicholsn]

great, thanks!