
admin.groupAddNamespace( config as element(configuration), group-id as (Number|String), namespaces as element(gr.namespace)[] ) as element(configuration)
Add one or more namespaces to a Group configuration, which will predefine the namespace(s) for all requests evaluated against any App Server in the Group.
http://marklogic.com/xdmp/privileges/admin/group
http://marklogic.com/xdmp/privileges/admin/group/{id}
  let admin = require("/MarkLogic/admin.xqy");
  let config = admin.getConfiguration()
  let groupid = admin.groupGetId(config, "Default")
  admin.groupAddNamespace(config, groupid,
       fn.head(xdmp.unquote('<namespace xmlns="http://marklogic.com/xdmp/group">\
         <prefix>myprefix</prefix>\
         <namespace-uri>http://myuri/forthisprefix</namespace-uri>\
        </namespace>')).root)
  
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