# Semantic Conventions for Database Calls and Systems **Status**: [Experimental][DocumentStatus] This document defines semantic conventions for database client spans as well as database metrics and logs. > **Warning** > Existing database instrumentations that are using > [v1.24.0 of this document](https://github.com/open-telemetry/semantic-conventions/blob/v1.24.0/docs/database/README.md) > (or prior) SHOULD NOT change the version of the database conventions that they emit by default > until a transition plan to the (future) stable semantic conventions has been published. > Conventions include, but are not limited to, attributes, metric and span names, and unit of measure. Semantic conventions for database operations are defined for the following signals: * [DB Spans](database-spans.md): Semantic Conventions for database client *spans*. * [DB Metrics](database-metrics.md): Semantic Conventions for database operation *metrics*. Technology specific semantic conventions are defined for the following databases: * [AWS DynamoDB](dynamodb.md): Semantic Conventions for *AWS DynamoDB*. * [Cassandra](cassandra.md): Semantic Conventions for *Cassandra*. * [Cosmos DB](cosmosdb.md): Semantic Conventions for *Microsoft Cosmos DB*. * [CouchDB](couchdb.md): Semantic Conventions for *CouchDB*. * [Elasticsearch](elasticsearch.md): Semantic Conventions for *Elasticsearch*. * [HBase](hbase.md): Semantic Conventions for *HBase*. * [MongoDB](mongodb.md): Semantic Conventions for *MongoDB*. * [MSSQL](mssql.md): Semantic Conventions for *MSSQL*. * [Redis](redis.md): Semantic Conventions for *Redis*. * [SQL](sql.md): Semantic Conventions for *SQL* databases. [DocumentStatus]: https://opentelemetry.io/docs/specs/otel/document-status