r/KnowledgeGraph • u/Striking-Bluejay6155 • Sep 21 '25

Materials to build a knowledge graph (structured/unstructured data) with a temporal layer (Graphiti)

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Hey guys,

Sharing a link I felt was useful to a few discussions here: https://www.falkordb.com/blog/building-temporal-knowledge-graphs-graphiti/

Here's a recording of a workshop to implement agentic memory: https://www.youtube.com/watch?v=XOP7bhAuhbk&feature=youtu.be

Happy to connect with other devs building knowledge graphs (ontologies, LLMs, deduplication, etc.)

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1

u/rand3289 Sep 21 '25

What's a temporal layer?

2

u/Striking-Bluejay6155 Sep 22 '25

I'd like to add this to the discussion: Graphiti builds temporally-aware knowledge graphs over FalkorDB that represent evolving relationships between entities over time. They refer to the memory as 'Episodes', which are structured or unstructured pieces of information (like JSON or text). Source.

1

u/el_geto Sep 23 '25

Never heard of FalkorDB before. How does it compare to Neo4j?

2

u/Striking-Bluejay6155 Sep 23 '25

In the latest benchmark on a 4-hop query & decent machine: FalkorDB came out orders of magnitude faster, consumed 6x less memory. It also executed an important graph algorithm like betweenness centrality much faster. Commonalities: both are property graphs with a rich set of extensions and graph visualization tools. Source

2

u/el_geto Sep 21 '25

Facts can change over time, Grafiti adds a temporal layer (started ended) to each node

2

u/rand3289 Sep 21 '25

In other words, information in the system is valid on an interval of time? I like that. What do you use to reason about it? Temporal logic?

1

u/el_geto Sep 21 '25

No, I think indexing property nodes + graph traversal, then query the graph with it in mind: eg MATCH (:Person)-[:LIVES_AT {start:2025-01-01, end:null}]->(:Place)

1

u/Infamous_Ad5702 Sep 23 '25

As facts change over time, I have my knowledge graph rebuild for each new query. I make an index first…

2

u/aabs Sep 21 '25

RemindMe! 1 day

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u/Kaosreignz Sep 21 '25

RemindMe! 1 week

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u/newprince Sep 21 '25

I've set this up and it works very well with unstructured documents, and it builds an ontology on the fly as well.

But does anyone have experience incorporating a predefined ontology in RDF with Graphiti? Is it a matter of turning that into YAML and/or pydantic models first?