OntoCast – ontology-assisted KG generation
Hey HN, I'm excited to announce a new release of OntoCast — an open-source framework for extracting semantic triples and building knowledge graphs (KG) from unstructured documents (PDF, JSON, Markdown, and more). Before extracting facts, OntoCast automatically selects or creates a relevant ontology and iteratively refines it, leading to much more accurate and context-aware fact extraction. This is especially valuable for cross-domain or complex documents where a static ontology falls short. - Agentic workflow: Uses LLMs (OpenAI/Ollama) to drive the extraction and ontology refinement…
OntoCast – ontology-assisted KG generation launched on June 30, 2025 with 9 votes, #3,023 of 7,999 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Agentic Ontology Assisted Framework for Semantic Triple Extraction - growgraph/ontocast
In the maker’s words, at launch
Hey HN, I'm excited to announce a new release of OntoCast — an open-source framework for extracting semantic triples and building knowledge graphs (KG) from unstructured documents (PDF, JSON, Markdown, and more). Before extracting facts, OntoCast automatically selects or creates a relevant ontology and iteratively…
Does a similar job
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