# Grasshopper2.Data.Mapping namespace

Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

## Classes

- [Map](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.mapping.map.md): Represents an individual map description. A map is a collection of path element and item index strings that mirrors path and item notation in data trees.
- [Mapping](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.mapping.mapping.md): Represents the mapping from a specific path topology to another.
- [MappingException](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.mapping.mappingexception.md): Exception used by the Map and Mapping types.
- [Sequence](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.mapping.sequence.md): Represents a summation sequence consisting of positive integers.