# About types of mappings in AtlasMap

AtlasMap supports the following general types of mappings:

- One to one — Map one source field to one target field.

- Many to one — Map multiple source fields to to one target field. You specify the delimiter character that AtlasMap inserts in the target field between the mapped source fields. The default delimiter is a space.

- One to many — Map one source field to multiple target fields. You specify the delimiter character that is in the source field. AtlasMap maps each delimited value to a the target field you select.

- For each — Iteratively map one source collection field to one target collection field.