If you count-triples and then sort-triples(by="OBJECT") values are as sorted as strings. OBJECT after counting is the counted number as string.
e.g.: following list (with template("${o}\t${s}"))
...
24 metadata.mods.relatedItem.typeOfResource.usage
248 metadata.mods.name.role.roleTerm.value
27 metadata.mods.subject.type
29 metadata.mods.abstract.value
29 metadata.mods.name.affiliation.value
3 metadata.mods.originInfo.dateModified.encoding
3 metadata.mods.originInfo.dateModified.value
30 metadata.mods.relatedItem.abstract.altRepGroup
320 metadata.mods.name.role.roleTerm.authority
320 metadata.mods.name.role.roleTerm.type
322 metadata.mods.name.type
...
It would be great if triples could also be sorted as numbers not just as string.