---
title: actor - X4 schema type
summary: actor: X4 attribute schema type: base types, constraints and value alternatives.
section: reference
kind: guide
status: reference
updated: 2026-10-27
tags: ["XSD","schema","types"]
sources: ["https://wiki.egosoft.com/X4%20Foundations%20Wiki/Modding%20Support/","https://www.w3.org/TR/xmlschema11-2/"]
---
## Meaning

actor: X4 attribute schema type: base types, constraints and value alternatives.

An XSD type constrains XML, rather than declaring a Lua return or the payload type of event.param. A valid schema value does not prove a successful game effect.

## Schema structure

`libraries/common.xsd`

| Property | Value |
| --- | --- |
| Construction | `restriction` |
| Base type | [`expression`](wiki:schema-expression-b8bc0e4f) |

restriction narrows a base type; union accepts one of its branches; list describes whitespace-separated items. Enumeration values in one restriction are alternatives. Pattern syntax is XML Schema regex, not Lua patterns or JavaScript RegExp. Constraints inherited from the base type still apply.

## Example and result

Use the attribute pages below for contextual examples. A generic executable example is not inferred from a type name alone.

## Used by

| Element | Attribute | Schema |
| --- | --- | --- |
| [`add_actor_to_room`](wiki:api-md-add-actor-to-room-a7262e0f) | `actor` | `libraries/common.xsd` |
| [`assign_control_entity`](wiki:api-md-assign-control-entity-64681450) | `actor` | `libraries/common.xsd` |
| [`clear_actor_lookat`](wiki:api-md-clear-actor-lookat-5bb9a1db) | `actor` | `libraries/common.xsd` |
| [`clear_actor_roomslot`](wiki:api-md-clear-actor-roomslot-f0eb11b7) | `actor` | `libraries/common.xsd` |
| [`dismiss_control_entity`](wiki:api-md-dismiss-control-entity-d30a7464) | `actor` | `libraries/common.xsd` |
| [`set_actor_lookat`](wiki:api-md-set-actor-lookat-7afcaf78) | `actor` | `libraries/common.xsd` |
| [`speak`](wiki:api-md-speak-8298e787) | `actor` | `libraries/common.xsd` |
| [`start_actor_sequence`](wiki:api-md-start-actor-sequence-649b0e49) | `actor` | `libraries/common.xsd` |


[All schema types](wiki:schema-types) · [Lua / MD value types](wiki:types)