> For the complete documentation index, see [llms.txt](https://docs.hyper-space.io/hyperspace-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hyper-space.io/hyperspace-docs/api-documentation/dsl-query-framework/candidate-generation-and-metadata-filtering.md).

# Candidate Generation and Metadata Filtering

Candidate filtering is the process of narrowing down a set of potential documents that might be relevant to a search query before the scoring phase. You can filter candidates using the following methods:

* Exact match between keywords
* Window Match Between Dates
* Match Between Geo Coordinates