# Object type mapping rules in Connect Customer Customer Profiles The topics in this section describe the rules and syntax for each part of an object type mapping: the field definitions that extract values from your source data, the key definitions and standard identifiers that match objects to profiles, complete examples that put the pieces together, and a reference for the standard objects that mappings populate. **Topics** + [Field definitions in Customer Profiles object type mappings](mapping-field-definitions.md) + [Key definitions in Customer Profiles object type mappings](mapping-key-definitions.md) + [Standard identifiers in Customer Profiles](standard-identifiers.md) + [Examples of object type mappings in Connect Customer Customer Profiles](examples-object-type-mappings.md) + [Reference for standard objects in Customer Profiles](standard-objects.md)