Thank you for your reply, I’m really glad you understood my question ! and your reply was very helpful
I refactored my data to make “freezes” children of the “Pug-2” LDPC and modified my query, I can get what I need now. Many thanks for taking the time Alan From: Sergio Fernández [mailto:wik...@apache.org] Sent: Thursday, July 23, 2015 1:06 AM To: users@marmotta.apache.org Subject: Re: LDPath Query Hi Alan On Wed, Jul 22, 2015 at 9:16 AM, Robson, Alan <alan.rob...@viasat.com<mailto:alan.rob...@viasat.com>> wrote: I’d like a single query to return all the freezes for a system specified by its fqdn in one shot (ie. if possible not have to query to collect the resources with that fqdn (eg sys:Pug-2) followed by a separate query to get the freezes that are rdf:about sys:Pug-2) First of all LDPath is a resource-centered query language: you start with a context resource and then you follow paths. For such kind of queries " return all the freezes for a system" maybe SPARQL would give your better expressiveness. Check it out in Marmotta, please. I have two questions… 1) How can I select cal:dtstart and cal:dtend times for freezes belonging to the freeze matching rdf:about[crtv:fqdn is "pug.local"] ? I can see how I can select rdf:about, but not the other fields in the freeze record Because at that point you already walked the path, you're already in the rdf:about, and you can' t go back to the parent. Jakob, do we have any trick for such construction? 2) How can I group the results together ? If I mess with it I can get a list of start times, a list of end times or even a big list of start and end times mixed together, but I can’t figure a way to get a list of pairs of start and end times that go together, one for each “Freeze”. Maybe I have just structured the data wrongly. I guess this is something easier to query with SPARQL... I'd recomend you to take a look to the language specification: http://marmotta.apache.org/ldpath/language<https://urldefense.proofpoint.com/v2/url?u=http-3A__marmotta.apache.org_ldpath_language&d=BQMFaQ&c=jcv3orpCsv7C4ly8-ubDob57ycZ4jvhoYZNDBA06fPk&r=xN9AnMDZvO_QvUZQZcoply6WFqSJuNcpv-dDu2fA4Ac&m=6dKkc45v-VtUhr8N5yVvFxs6iUwTMsTmXkBxiLJxep8&s=Ac2ojgwD6rw2P_hogJwTlLr30Dqycnd0LS1wvnIhEmQ&e=> Sorry for not being so helpful. If Jakob jumps in he could probably help you more, since he is the expert on LDPath. Cheers, -- Sergio Fernández Partner Technology Manager Redlink GmbH m: +43 6602747925 e: sergio.fernan...@redlink.co<mailto:sergio.fernan...@redlink.co> w: http://redlink.co<https://urldefense.proofpoint.com/v2/url?u=http-3A__redlink.co_&d=BQMFaQ&c=jcv3orpCsv7C4ly8-ubDob57ycZ4jvhoYZNDBA06fPk&r=xN9AnMDZvO_QvUZQZcoply6WFqSJuNcpv-dDu2fA4Ac&m=6dKkc45v-VtUhr8N5yVvFxs6iUwTMsTmXkBxiLJxep8&s=UpfBfd6ivLMSjRuXEcQGhTt2w_mcxsScwEfwS7BVjWM&e=>
