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xmlns:ali NISO ALI Namespace (NISO Access License and Indicators)

This is not an attribute, but the namespace pseudo-attribute. The value provides a prefix and URI to use for the ALI (NISO Access License and Indicators) elements. All namespace prefixes must be associated with a URL, and the prefix “ali” has been set to the URL http://www.niso.org/schemas/ali/1.0 as per the NISO ALI Best Practices recommendation.
FIXED (not settable) on many elements; click for list and usage

<adoption>, <ali:free_to_read>, <ali:license_ref>, <standard>

Value Meaning
http://www.niso.org/schemas/ali/1.0 The URI named in the NISO Access License and Indicators for the ALI elements.
Restriction This attribute has a fixed value which may not be changed in the XML document.