> For the complete documentation index, see [llms.txt](https://relationlabs.gitbook.io/protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://relationlabs.gitbook.io/protocol/indexer.md).

# Graph Indexer

- [Definition and usage](https://relationlabs.gitbook.io/protocol/indexer/introduction.md)
- [Listen to events](https://relationlabs.gitbook.io/protocol/indexer/event-listener.md)
- [To parse RDF data](https://relationlabs.gitbook.io/protocol/indexer/parse-data.md)
- [To build a social graph](https://relationlabs.gitbook.io/protocol/indexer/build-graph.md)