---
title: xs:integer - X4 schema type
summary: xs:integer: An XML Schema integer without a fractional part. Engine ranges depend on the attribute.
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

xs:integer: An XML Schema integer without a fractional part. Engine ranges depend on the attribute.

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

`W3C XML Schema`

| Property | Value |
| --- | --- |
| Construction | `builtin` |
| Base type | [`xs:decimal`](wiki:schema-xs-decimal-33321cf5) |

| Constraint | Value |
| --- | --- |
| `fractionDigits` | `0` |

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

```text
12
```

**What happens:** 12 is an integer; 1.5 is not.

Object and group variables must already exist in the correct MD / AI context. These are learning fragments, not a complete runnable mission.

## Used by

| Element | Attribute | Schema |
| --- | --- | --- |
| [`level`](wiki:api-md-level-f1dfe606) | `budget` | `libraries/gamestarts.xsd` |
| [`select`](wiki:api-md-select-7d56c04d) | `weight` | `libraries/sound_library.xsd` |
| [`select`](wiki:api-md-select-7d56c04d) | `index` | `libraries/sound_library.xsd` |
| [`speak`](wiki:api-md-speak-8298e787) | `priority` | `libraries/voicesequences.xsd` |


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