Good question. Let me first point to an interesting example in the Visual Guide to Streaming Expressions and Math Expressions:
https://github.com/apache/lucene-solr/blob/visual-guide/solr/solr-ref-guide/src/search-sample.adoc#nodes This example gets to the heart of the core use case for the nodes expression which is to discover the relationships between nodes in a graph. So it's a discovery tool to learn something new about the data that you can't see without having this specific ability of walking the nodes in a graph. In the broader context the nodes expression is part of a much wider set of tools that allow people to use Solr to explore the relationships in their data. This is described here: https://github.com/apache/lucene-solr/blob/visual-guide/solr/solr-ref-guide/src/math-expressions.adoc The goal of all this is to move search engines beyond basic aggregations to study the correlations and relationships within the data set. Graph traversal is part of this broader goal which will get developed more over time. I'd be interested in hearing more about specific graph use cases that you're interested in solving. Joel Bernstein http://joelsolr.blogspot.com/ On Wed, May 20, 2020 at 12:32 PM Nightingale, Jonathan A (US) < jonathan.nighting...@baesystems.com> wrote: > This is kind of broad question, but I was playing with the graph streams > and was having trouble making the tools work for what I wanted to do. I'm > wondering if the use case for the graph streams really supports standard > graph queries you might use with Gemlin or the like? I ask because right > now we have two implementations of our data storage to support these two > ways of looking at it, the standard query and the semantic filtering. > > The usecases I usually see for the graph streams always seem to be limited > to one link traversal for finding things related to nodes gathered from a > query. But even with that it wasn't clear the best way to do things with > lists of docvalues. So for example if you wanted to represent a node that > had many doc values I had to use cross products to make a node for each doc > value. The traversal didn't allow for that kind of node linking inherently > it seemed. > > So my question really is (and maybe this is not the place for this) what > is the intent of these graph features and what is the goal for them in the > future? I was really hoping at one point to only use solr for our product > but it didn't seem feasible, at least not easily. > > Thanks for all your help > Jonathan > > Jonathan Nightingale > GXP Solutions Engineer > (office) 315 838 2273 > (cell) 315 271 0688 > >
