# Entities

- [Edge](/reference/api-v2/entities/edge.md)
- [Fields](/reference/api-v2/entities/edge/fields.md): Edges can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Edge object.
- [Tags](/reference/api-v2/entities/tag.md)
- [Fields](/reference/api-v2/entities/tag/fields.md): Tags can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Tag object.
- [Group](/reference/api-v2/entities/group.md)
- [Fields](/reference/api-v2/entities/group/fields.md): Groups can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Group object.
- [Note](/reference/api-v2/entities/note.md)
- [Fields](/reference/api-v2/entities/note/fields.md): Notes can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Note object.
- [Invitation](/reference/api-v2/entities/invitation.md)
- [Types and Structure](/reference/api-v2/entities/invitation/types-and-structure.md)
- [Fields](/reference/api-v2/entities/invitation/fields.md): Invitations can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Invitation object.
- [Specifiers](/reference/api-v2/entities/invitation/specifiers.md)
- [Dollar Sign Notation](/reference/api-v2/entities/invitation/dollar-sign-notation.md)
- [Edit](/reference/api-v2/entities/edit.md)
- [Fields](/reference/api-v2/entities/edit/fields.md): Edits can only have certain fields and have a specific format. Some of these fields are the same as other objects and some are specific to the Edit object.
- [Inference](/reference/api-v2/entities/edit/inference.md)
- [Profile](/reference/api-v2/entities/profile.md)
- [Fields](/reference/api-v2/entities/profile/fields.md)