---
title: destructibleclasslookup - X4 schema type
summary: destructibleclasslookup: 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

destructibleclasslookup: 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 | `union` |
| Union members | [`objectclasslookup`](wiki:schema-objectclasslookup-59d5b36d), [`entityclasslookup`](wiki:schema-entityclasslookup-355d19ca), [`expression`](wiki:schema-expression-b8bc0e4f) |

Additional inline union branch:

| Property | Value |
| --- | --- |
| Construction | `restriction` |
| Base type | [`xs:string`](wiki:schema-xs-string-d5652e9b) |

| Constraint | Value |
| --- | --- |
| `enumeration` | `class.adsign` |
| `enumeration` | `class.buildmodule` |
| `enumeration` | `class.cargobay` |
| `enumeration` | `class.construction` |
| `enumeration` | `class.controlpanel` |
| `enumeration` | `class.destructible` |
| `enumeration` | `class.dockarea` |
| `enumeration` | `class.engine` |
| `enumeration` | `class.habitation` |
| `enumeration` | `class.interior` |
| `enumeration` | `class.launcher` |
| `enumeration` | `class.lock` |
| `enumeration` | `class.module` |
| `enumeration` | `class.navcontext` |
| `enumeration` | `class.pier` |
| `enumeration` | `class.processingmodule` |
| `enumeration` | `class.production` |
| `enumeration` | `class.radar` |
| `enumeration` | `class.scanner` |
| `enumeration` | `class.shieldgenerator` |
| `enumeration` | `class.storage` |
| `enumeration` | `class.turret` |
| `enumeration` | `class.ventureplatform` |
| `enumeration` | `class.walkablemodule` |
| `enumeration` | `class.welfaremodule` |
| `enumeration` | `class.weapon` |

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
This type is referenced through other schema types.

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