# Understanding queries

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**Added in** `eventcatalog@2.10.0`

Queries are a type of message that represent requests for information.

In EventCatalog [Services](/docs/development/guides/services/introduction.md) may query (send) or accept (receive) queries in your architecture.

### Queries in EventCatalog[​](#queries-in-eventcatalog "Direct link to Queries in EventCatalog")

* Queries in EventCatalog can be **accepted** by services or **invoked** by services.
* Queries in EventCatalog are green
* Queries live in the `/queries` folder.

![Example](/assets/images/query-example-2b5e6828c13de779999642ed20efef3b.png)