---
title: xs:float - X4 schema type
summary: xs:float: An XML Schema single-precision number. An attribute may impose additional units or ranges.
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:float: An XML Schema single-precision number. An attribute may impose additional units or ranges.

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` |

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
0.5
```

**What happens:** 0.5 is a numeric literal; its suitability for a game action is a separate requirement.

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) | `eventbonus` | `libraries/diplomacy.xsd` |
| [`level`](wiki:api-md-level-f1dfe606) | `score` | `libraries/gamestarts.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `startvalue` | `libraries/effects.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `sustainvalue` | `libraries/effects.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `endvalue` | `libraries/effects.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `attackduration` | `libraries/effects.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `sustainduration` | `libraries/effects.xsd` |
| [`linear`](wiki:api-md-linear-97d295b2) | `releaseduration` | `libraries/effects.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/effects.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/effects.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/effects.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `yaw` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `pitch` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `roll` | `libraries/libraries.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/objectspawnpoints.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/objectspawnpoints.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/objectspawnpoints.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/parameters.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/parameters.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/parameters.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/region_definitions.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/region_definitions.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/region_definitions.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `x` | `libraries/regionyields.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `y` | `libraries/regionyields.xsd` |
| [`position`](wiki:api-md-position-e04350c5) | `z` | `libraries/regionyields.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `pitch` | `libraries/effects.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `yaw` | `libraries/effects.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `roll` | `libraries/effects.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `yaw` | `libraries/objectspawnpoints.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `pitch` | `libraries/objectspawnpoints.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `roll` | `libraries/objectspawnpoints.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `yaw` | `libraries/parameters.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `pitch` | `libraries/parameters.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `roll` | `libraries/parameters.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `min` | `libraries/parameters.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `max` | `libraries/parameters.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `yaw` | `libraries/region_definitions.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `pitch` | `libraries/region_definitions.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `roll` | `libraries/region_definitions.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `yaw` | `libraries/regionyields.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `pitch` | `libraries/regionyields.xsd` |
| [`rotation`](wiki:api-md-rotation-d8026988) | `roll` | `libraries/regionyields.xsd` |
| [`select`](wiki:api-md-select-7d56c04d) | `cooldown` | `libraries/objectspawnrules.xsd` |
| [`variation`](wiki:api-md-variation-6dcc0b05) | `min` | `libraries/parameters.xsd` |
| [`variation`](wiki:api-md-variation-6dcc0b05) | `max` | `libraries/parameters.xsd` |


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