## XmlMapping.store_item_id property

Specifies the custom XML data identifier for the custom XML data part which
shall be used to evaluate the [XmlMapping.xpath](../xpath/) expression.



```python
@property
def store_item_id(self) -> str:
    ...

```

### Examples

Shows how to get the custom XML data identifier of an XML part.

```python
doc = aw.Document(file_name=MY_DIR + 'Custom XML part in structured document tag.docx')
# Structured document tags have IDs in the form of GUIDs.
tag = doc.get_child(aw.NodeType.STRUCTURED_DOCUMENT_TAG, 0, True).as_structured_document_tag()
self.assertEqual('{F3029283-4FF8-4DD2-9F31-395F19ACEE85}', tag.xml_mapping.store_item_id)
```

### See Also

* module [aspose.words.markup](../../)
* class [XmlMapping](../)