Github user kinow commented on the issue: https://github.com/apache/jena/pull/237 @afs, >Changing NodeValueString looks dubious Agreed. I thought there should be another way Having a new `NodeValue` type like `NodeValueSortKey` sounds like a good plan, as well as a new value space type. I'm updating the pull request (99% done in my local working copy), but will spend some time reviewing the code, and writing initial unit tests now :-) Will update this pull request in the next hours. Bruno
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