Currently the HTML version of element specs has a button to toggle between the two RELAX NG syntaxes. However, the buttons are confusingly labeled:
a) "Compact to XML format" sounds like if you click it, it will compact something into an XML format.
b) "XML format to compact" sounds like it will show you some sort of XML format that you can compact.
This came up at some Council meeting since 2010, and I recall that Brett Barney was similarly confused.
I suggest clarifying the labels as follows:
Compact to XML format ==> Change RELAX NG compact syntax to XML syntax
XML format to compact ==> Change RELAX NG XML syntax to compact syntax