Thank you Michael, I have been busy, so I appologize for my late response, I thought that the traditional network traversal and investigation problems would be "the catch", when talking about graph-databases. I am clearly off, on that point :) My background in networks is from electronics and later on "utility networks". Thus, this is my prime point of view.
Thank you very much for the links - I will indeed dwelve into them when time permits. Best, /Aron On Sunday, November 19, 2017 at 6:54:15 AM UTC+1, Michael Hunger wrote: > You can model your NODE and COMPONENT as Nodes in Neo4j. > > In our query language Cypher you indicate direction with an arrow tip '>' > or '<' that you can also leave off for undirected matches. > > Best is to import your data first using either LOAD CSV or the apoc > <https://github.com/neo4j-contrib/neo4j-apoc-procedures> library (that > you can install in neo4j desktop under 'Plugins') > with apoc.load.jdbc and creating your nodes first and then connecting them > with relationships. > > And then incrementally write the queries. You can use variable length > queries for longer patterns. > Best to quickly take our online course > <https://neo4j.com/graphacademy/online-training/introduction-graph-databases/> > > and then use the cypher-refcard > <http://neoj4.com/docs/cypher-refcard/current>. > > You might find some examples here: portal.graphgist.org > > https://portal.graphgist.org/graph_gists/3d453f61-68c3-48c0-aa52-a1fc4a7f3d47 > - Piping Water > > Cheers, Michael > > > On Thu, Nov 9, 2017 at 12:35 AM, Aron Olsen <aron...@gmail.com > <javascript:>> wrote: > >> Hi there, >> >> I am a complete newbie with Neo4J. >> >> Despite that, I have programmed and implemented native "engines" to >> perform network traversals and computations in the domain of utility >> networks (water-supply, sewing, district heating, natural gas distribution). >> In this respect it was essential for us, to isolate and rank >> ring-systems, in order to establish matrices of equations to be solved / >> balanced as of Kirchoffs laws. >> >> Nowadays such "engines" / "frameworks" are off-the-shelf products, and I >> have no intentions to compete with such at all. >> My goal is to establish a fairly simple model of a network, allowing an >> end-user to perform various kinds of queries against it, i.e. what is >> upstream/downstream relative to a position in the graph, who will be >> affected when this pipe is broken, how to shut-off etc.. >> >> In my RDBMs the network is constituted by the following entities: >> >> EDGE: A connection between two nodes in terms of a pipe. Have a natural >> orientation of say left-to-right: EDGE_ID, LEFT_NODE_ID, RIGHT_NODE_ID >> NODE: A junction for multiple edge. May be marked as being a "sink" or a >> "source": NODE_ID >> COMPONENT: Something that is attached to an EDGE at a relative position >> in the range [0.0 .. 1.0]: COMP_ID, EDGE_ID, EDGE_POS >> >> I need to perform a traversal from some position on some edge to the rest >> of the network, stopping at COMPONENTs / NODEs satisfying various filters, >> and collecting properties of the graph traversed when doing so (NODES, >> EDGE-segments, COMPONENTs). >> >> Some of the challences for me are: >> >> Edges may be traversable in one direction only or in both directions. >> This is a predefined property of an edge, but how to model it, and how to >> implement a traverse-scheme that respects it? >> The components attached to an edge need to be traversed in left or right >> fashion starting at some position in the range 0.0 to 1.0. How to >> facilitate this? >> >> Does anybody know about anything that just resembles something like this >> in Neo4J? >> >> Thank you! >> >> /Aron >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Neo4j" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neo4j+un...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
