This is an ad for ZenDB.
EDIT: Having reread the paper in full I don't hold this view anymore. Leaving up for reply posterity.
EDIT: Having reread the paper in full I don't hold this view anymore. Leaving up for reply posterity.
This paper is describing a technique to query Semantic Hierarchical Trees (SHTs) constructed from documents. I would say that the data itself *is* structured, it just exists in an unstructured medium, but now I'm just arguing...semantics.
That being said I suspect they didn't think ShtDB would catch on very well, and so went with ZenDB. Shame really.