# LibTmux.Query.QueryRelationCardinality.One

- **Module:** LibTmux.Query
- **Package:** LibTmux
- **Language:** C#
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/cf34b255c896d19a97e7d7fabea58609c916012d/src/LibTmux/Query/QueryFieldCatalog.cs#L562
- **Page:** https://libtmux.org/en/csharp/latest/reference/libtmux-query-queryrelationcardinality-one/

A captured to-one relation.