# 69. SP-GiST Indexes

- [65.1. Introduction](/15/internals/sp-gist-indexes/introduction.md)
- [65.2. Built-in Operator Classes](/15/internals/sp-gist-indexes/built-in-operator-classes.md)
- [65.3. Extensibility](/15/internals/sp-gist-indexes/extensibility.md)
- [65.4. Implementation](/15/internals/sp-gist-indexes/implementation.md)
- [65.5. Examples](/15/internals/sp-gist-indexes/examples.md)