The **Aspose.Words.Properties** namespace provides classes to work with custom and built-in document properties such as title, keywords, company etc.

## Classes

| Class | Description |
| --- | --- |
| [BuiltInDocumentProperties](./builtindocumentproperties/) | A collection of built-in document properties. |
| [CustomDocumentProperties](./customdocumentproperties/) | A collection of custom document properties. |
| [DocumentProperty](./documentproperty/) | Represents a custom or built-in document property. |
| [DocumentPropertyCollection](./documentpropertycollection/) | Base class for [`BuiltInDocumentProperties`](../aspose.words.properties/builtindocumentproperties/) and [`CustomDocumentProperties`](../aspose.words.properties/customdocumentproperties/) collections. |
## Enumeration

| Enumeration | Description |
| --- | --- |
| [DocumentSecurity](./documentsecurity/) | Used as a value for the [`Security`](../aspose.words.properties/builtindocumentproperties/security/) property. Specifies the security level of a document as a numeric value. |
| [PropertyType](./propertytype/) | Specifies data type of a document property. |