Hi:
HTML is not XML -- yes, they are both "related" to SGML -- but they are more like distant cousins, than brothers. They are not interchangeable file types. A browser will open and render an XML file, only if the XML file contains an XML processing instruction for a CSS file or an XSL file.
The XML Libname engine is meant to be used on non-hierarchical XML data files. It would not be the appropriate technique to use to read an HTML table into a SAS dataset.
You can use the URL access method on the FILENAME statement to read an HTML file from a web site:
http://support.sas.com/documentation/cdl/en/lrdict/62618/HTML/default/a000223242.htm
http://support.sas.com/documentation/cdl/en/lrcon/61722/HTML/default/a001282569.htm
Depending on what is in your HTML file, however, (if there are a lot of IMG tags or embedded JavaScript), you might need to work with Tech Support because the URL access method is meant to open an HTML file from a web site, using either the HTTP or HTTPS protocol.
cynthia