EP Cheat Sheet

This page is a quick-reference appendix listing all built-in system types shipped with the platform. These types form the meta model and cannot be modified by customers.

Built-in Entity Types

Reference	Description
entity_type/entity_type	The meta-type for all entity types (self-describing)
entity_type/relationship_type	Defines typed connections between entities
entity_type/property_type	Base type for all property types
entity_type/trait	Defines dynamic mixin types
entity_type/lc_map	Lifecycle map definition
entity_type/lc_status	Lifecycle status definition
entity_type/action	Base type for actions
entity_type/executable_script	Action subtype: inline Lua script
entity_type/service_function	Action subtype: external HTTP endpoint
entity_type/enums	Enum definition
entity_type/enum_entry	Individual value within an enum
entity_type/file	File entity (used by preview trait)

Built-in Relationship Types

Name	Target	Description	Docs
has_prop	property_type	Declares a property on an entity or relationship type	Property Types
has_virtual_prop	property_type	Declares a computed (read-only) property	Virtual Properties
has_rel	relationship_type	Declares a relationship on an entity or relationship type	Relationship Types
has_list	entity_type	Declares an ordered sub-entity list	Lists
has_parent	entity_type	Inheritance link (child extends parent)	Inheritance
has_lc_map	lc_map	Assigns a lifecycle map to an entity type	Lifecycle
has_lc_status	lc_status	Links a lifecycle map to its statuses	Lifecycle
has_lc_transition	lc_status	Defines a valid transition between statuses	Lifecycle
has_action	action	Declares a callable action on an entity type	Actions & Hooks
has_hook	action	Declares a lifecycle hook on an entity type	Actions & Hooks

Built-in Property Types

Scalar Types

Reference	Description
bool_property_type/generic	Boolean (true/false)
int_property_type/generic	Integer
float_property_type/generic	Floating point
datetime_property_type/generic	Date/time (ISO 8601)
blob_property_type/generic	Binary large object (S3 reference)

String Types

Reference	Regex	Description
string_property_type/generic	--	Plain string
string_property_type/system_name	[a-zA-Z0-9_]+	System-safe identifier
string_property_type/filename	^[^<>:;,?"*|/]+$	Valid filename
string_property_type/email	RFC 5321	E-mail address
string_property_type/uri	RFC 3986	Uniform Resource Identifier
string_property_type/url	RFC 3986	Uniform Resource Locator
string_property_type/lua_script	--	Lua scripting code

Multi-Language Types

Reference	Description
multi_lang_property_type/generic	Localized string (locale map)
multi_lang_property_type/standard_label	Localized display name
multi_lang_property_type/standard_description	Localized description

Rich Text

Reference	Description
rich_text_property_type/generic	Formatted/rich text content

Entity Reference Types

Reference	Target	Description
entity_property_type/file_ref	entity_type/file	Reference to a file entity
entity_property_type/entity_type_ref	entity_type/entity_type	Reference to an entity type

Enum Types

Reference	Description
enum_property_type/generic	Generic enum property

Built-in Traits

Reference	Description	Docs
trait/is_preview_enabled	Attaches a preview file to an entity	Traits
trait/is_semantically_tagged	Attaches a semantic tag URI	Traits

Built-in Lifecycle: EP_Default

Status	Number	Released	Read-Only	Color
lc_status/new	0	no	no	#FF0000
lc_status/review	100	no	yes	#FFBB00
lc_status/released	200	yes	yes	#00FF00
lc_status/obsolete	300	no	yes	#DDDDDD

Transitions: new -> review -> released -> obsolete, and review -> new.

See Lifecycle for the full documentation.