# Anybody here using ActiveRDF? **URL:** \ **Category:** Ruby\ **Created:** [January 21, 2007, 1:41pm UTC](https://www.ruby-forum.com/t/anybody-here-using-activerdf/82820 "2007-01-21T13:41:46Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![damaris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/2bfe46/32.png) [@damaris](https://www.ruby-forum.com/u/damaris)\ **Post date:** [January 21, 2007, 1:41pm UTC](https://www.ruby-forum.com/t/anybody-here-using-activerdf/82820/1 "2007-01-21T13:41:46Z")
hi you all, I’m starting working with ActiveRDF and I have very simple newbie questions. Is anybody here using it to ask my questions before I send them to the ActiveRDF mailing list? Thanks ---
**Author:** ![damaris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/2bfe46/32.png) [@damaris](https://www.ruby-forum.com/u/damaris)\ **Post date:** [January 21, 2007, 3:45pm UTC](https://www.ruby-forum.com/t/anybody-here-using-activerdf/82820/2 "2007-01-21T15:45:07Z")
On 1/21/07, Damaris F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’m starting working with ActiveRDF and I have very simple newbie > questions. Is anybody here using it to ask my questions before I send > them to the ActiveRDF mailing list? I’ve experimented with it a little bit, but I’m not using it heavily yet. It still seems a little brittle to me. Why is it that you don’t want to ask your questions on the ActiveRDF mailing list, though? ---
**Author:** ![damaris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/2bfe46/32.png) [@damaris](https://www.ruby-forum.com/u/damaris)\ **Post date:** [January 21, 2007, 4:05pm UTC](https://www.ruby-forum.com/t/anybody-here-using-activerdf/82820/3 "2007-01-21T16:05:53Z")
Well, it’s just I think my questions are quite silly for the mailing list, which is very advanced, as far as what I’ve seen in it… ☹ My questions are the following: - ActiveRDF can work with Jena, as FAQ[1] says. However, there is no adapter for Jena [2]. Furthermore, Jena is not a database by itself, it’s a framework with no DB (DB can be then MySQL, Oracle, etc.). I would like to know more about this cause my application will have to do inferences. - There is no adapter for YARS if I wanted to use it. - If my adapter is “rdflite” and I load data from a file, has my file to be in N3 format? - I’m doing the examples for writing with RDFlite. However, I haven’t installed RDFLite yet so, is there information there on how to install RDFLite, or SQLite3, and how my connection should be established? I would like to test all of this with RDFLite before changing to something like Jena. Lots of thanks. [1] [http://wiki.activerdf.org/FrequentlyAskedQuestions](http://wiki.activerdf.org/FrequentlyAskedQuestions) [2] [http://wiki.activerdf.org/GettingStartedGuide](http://wiki.activerdf.org/GettingStartedGuide) Lyle J. wrote: > On 1/21/07, Damaris F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > I’m starting working with ActiveRDF and I have very simple newbie > > questions. Is anybody here using it to ask my questions before I send > > them to the ActiveRDF mailing list? > > I’ve experimented with it a little bit, but I’m not using it heavily > yet. It still seems a little brittle to me. Why is it that you don’t > want to ask your questions on the ActiveRDF mailing list, though? ---
**Author:** ![damaris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/2bfe46/32.png) [@damaris](https://www.ruby-forum.com/u/damaris)\ **Post date:** [January 21, 2007, 9:46pm UTC](https://www.ruby-forum.com/t/anybody-here-using-activerdf/82820/4 "2007-01-21T21:46:59Z")
On 1/21/07, Damaris F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Well, it’s just I think my questions are quite silly for the mailing > list, which is very advanced, as far as what I’ve seen in it… ☹ I don’t think that should discourage you from posting your question(s) there. If anyone’s an expert on ActiveRDF it should be them! > My questions are the following: > > - ActiveRDF can work with Jena, as FAQ[1] says. However, there is no > adapter for Jena [2]. Furthermore, Jena is not a database by itself, > it’s a framework with no DB (DB can be then MySQL, Oracle, etc.). I > would like to know more about this cause my application will have to do > inferences. Like you, I haven’t seen an adapter for Jena in the official release of ActiveRDF. I did a Google search of the ActiveRDF mailing list (using the search string “jena site:lists.deri.org”) and came up with this hit: ``` http://lists.deri.org/pipermail/activerdf/2006-November/000144.html ``` Based on this (the announcement of ActiveRDF 1.0, from last November) it sounds like the Jena adapter is still under development. Perhaps it’s in their source code repository if you check that out (I haven’t done that). You’re right of course that Jena isn’t a database per se. I’m _guessing_ that the ActiveRDF adapter for Jena is analogous to the adapter for Redland (which isn’t a database either). The adapter for Redland is a wrapper around a Redland model, which could be backed by either a database or in-memory store. > - There is no adapter for YARS if I wanted to use it. See previous link, which also claims that a YARS adapter is “under development”. > - If my adapter is “rdflite” and I load data from a file, has my file to > be in N3 format? I’ve only used the Redland adapter so far, but I found that by default it was looking for N3 formatted triples. I found, however, that by adding a second argument in the call to load that I could load an RDF/XML formatted file, e.g. ``` store = ConnectionPool.add_data_source(:type => :redland) store.load("example.rdf", "rdfxml") ``` I don’t know if this will work with the rdflite adapter, though. > - I’m doing the examples for writing with RDFlite. However, I haven’t > installed RDFLite yet so, is there information there on how to install > RDFLite, or SQLite3, and how my connection should be established? I > would like to test all of this with RDFLite before changing to something > like Jena. This page: ``` http://wiki.activerdf.org/GettingStartedGuide ``` has some instructions about installing the RDFLite adapter, which appears to depend on sqlite3, the sqlite3 gem, and ferret. It looks like there are also some instructions there about how to establish a connection once you’ve got it all installed. Hope this helps, Lyle P.S. I would strongly recommend following up on the ActiveRDF mailing list. They could for example tell you more about the current development status of the Jena and YARS adapters.