This message from Roland.
PS Roland, you sent this to thredds-dev and it bounced because ...
I was just studying the 1.0 Catalog Spec to see what I would like to steal for defining a more complete LAS metadata element.
When defining the <documentation> or <metadata> element, references to external URLs are specified using XLink attributes, but when defining a URL pointing to an external reference for the <creator> element a simple "url" attribute is used.
What is different about these two situations that lead to the choice of XLink attribute group vs. a single "url" attribute?
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