Range of "spm:softwareRevision"

**Term**: `spm:softwareRevision`
**Range**: xsd:int
**Current link**:  [nidm-results.owl/spm:softwareRevision](https://github.com/incf-nidash/nidm/blob/master/nidm/nidm-results/nidm-results.owl#L1156-L1169)

---

@cmaumet `10:14 25 Apr`
Are software revisions in SPM always defined with integers?