-2

The fuzzy reasoner Delorean was open to the public once, I believe. But now nothing was there (Docs1), no java documentation. What happened? Or it was never an open-source project? I found a link (Docs2) in their new paper "Delorean: a reasoner for fuzzy OWL 2", but I couldn't open it.

I was trying to test the usability of fuzzyDL and Delorean, but I found fuzzyDL somewhat unreasonable, it keeps saying "Nullpointer exception" where fetching the query results, no matter what the queries were. I don't understand why. Can someone give a hint please?

Sitansu
  • 3,225
  • 8
  • 34
  • 61
Peiqin
  • 378
  • 4
  • 12

1 Answers1

1

Can someone give a hint please?

Hint: Contact the author by email.

There is a downloads link on the main site at http://webdiis.unizar.es/~fbobillo/delorean, but it is going to an error page. (And if you believe what the Wayback Machine says, that link has never worked!)

The phrase "open to the public" is not meaningful. If the code was (really) published as Open Source at some point, then it should still be Open Source. A genuine Open Source license cannot be rescinded. On the other hand, I cannot find any evidence that DeLorean was ever published as open source.

If something says NullPointerException, that is evidence of a bug, not "unreasonableness". However, that bug could be in your code rather than the code you are trying to use; e.g. if you are using it incorrectly.

Stephen C
  • 698,415
  • 94
  • 811
  • 1,216
  • Thanks, I should've contacted the author. – Peiqin Dec 29 '13 at 07:34
  • Late Comment, but for fuzzyDL you should have consider the README first because it says that you need to install the gurobi tool. If you dont, then you get some `NullPointerException`. Bad software engineering I know, since fuzzyDL could warn you about the missing dependency, but its free code. – erikzenker Apr 23 '15 at 08:34