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title: Types Types (dw::core::Types)
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product: DataWeave
version: 2.9
---

# Types Types (dw::core::Types)

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

<table><colgroup><col> <col> <col></colgroup><thead><tr><th>Type</th><th>Definition</th><th>Description</th></tr></thead><tbody><tr><td><p>Attribute</p></td><td><div><div><p><code>type Attribute = { name: QName, required: Boolean, value: Type }</code></p></div></div></td><td><div><div><p>Represents an Attribute definition that is part of an Object field Key.</p></div><div><p><em>Introduced in DataWeave version 2.3.0.</em></p></div></div></td></tr><tr><td><p>Field</p></td><td><div><div><p><code>type Field = { key: { name: QName, attributes: Array&lt;Attribute&gt; }, required: Boolean, repeated: Boolean, value: Type }</code></p></div></div></td><td><div><div><p>Represents a Field description that is part of an Object.</p></div><div><p><em>Introduced in DataWeave version 2.3.0.</em></p></div></div></td></tr><tr><td><p>FunctionParam</p></td><td><div><div><p><code>type FunctionParam = { paramType: Type, optional: Boolean }</code></p></div></div></td><td><div><div><p>Represents a Function parameter that is part of a Function type.</p></div><div><p><em>Introduced in DataWeave version 2.3.0.</em></p></div></div></td></tr><tr><td><p>QName</p></td><td><div><div><p><code>type QName = { localName: String, namespace: Namespace | Null }</code></p></div></div></td><td><div><div><p>Represents a Qualified Name definition with a <code>localName</code> (a string) and a <code>namespace</code>. If the QName does not have a Namespace, its value is <code>null</code>.</p></div><div><p><em>Introduced in DataWeave version 2.3.0.</em></p></div></div></td></tr></tbody></table>