# Documents & search
Source: https://nordvec.com/docs/guides/concepts/documents#content-types

## Content types [#content-types]

A document can carry a knowledge type in `content_type` (for example
`decision`, `runbook`, `policy` or `faq`). A pushed document sets it with the
push API's `type`; a document with no type has `content_type: null`. Search and
list both filter on it with `contentType`.