CGImageMetadataTagCopyNamespace(_:)
Returns an immutable copy of the tag’s XMP namespace.
Declaration
func CGImageMetadataTagCopyNamespace(_ tag: CGImageMetadataTag) -> CFString?Parameters
- tag:
The metadata tag from which to fetch the namespace information.
Return Value
An immutable string that contains the tag’s namespace. For a list of public namespaces, see XMP Namespaces and Prefixes. You are responsible for releasing this string.
Discussion
By convention, namespaces end with either a / or # character. For example, EXIF metadata uses the namespace http://ns.adobe.com/exif/1.0/. Custom namespaces must be a valid XML namespace.