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
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 @xmlns:ali has a fixed value which may not be changed in the document.
Tagged Sample

<ali:free_to_read>

...
<permissions>
 <ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" 
   start_date="2014-01-01" end_date="2014-12-31"/>
</permissions>
...