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## XML DOM: getAttributeNS() Method The `getAttributeNS()` method retrieves the value of an attribute with a specified namespace URI and local name from an XML element. This method is particularly useful when working with XML documents that contain multiple namespaces, preventing naming conflicts by targeting attributes within a specific namespace. --- ## Syntax ```javascript elementNode.getAttributeNS(namespaceURI, localName) ``` ### Parameters | Parameter | Type | Required / Optional | Description | | :--- | :--- | :--- | :--- | | `namespaceURI` | String | **Required** | The namespace URI of the attribute to retrieve. | | `localName` | String | **Required** | The local name of the attribute to retrieve. | ### Return Value * **String**: The value of the specified attribute. * **Null** or **Empty String (`""`)**: If the specified attribute does not exist or does not have a default value, the method returns `null` or an empty string (depending on the browser/DOM parser implementation). --- ## Code Example The following example demonstrates how to load an XML document with namespaces (`books_ns.xml`) and retrieve the value of a namespaced attribute (`lang`) from the first ` 29.99 ``` ### JavaScript Implementation ```javascript // Load the XML document var xmlDoc = loadXMLDoc("books_ns.xml"); // Get the first