xEpan Vs. Epan Services
"xEpan" and "Epan Services" You will come across two words everywhere in documentation for simplicity you can treat both as same thing. Just consider we are using any one name randomly during documentation.
For technical persons, here is the difference :
xEpan is opensource System developed in PHP with agiletoolkit.org framework by Xavoc Technocrats, while Epan services is hosted and pre installed application set of xEpan. So on coarse level both refers to same. But in technical, xEpan refers to OpenSource System and Epan Services refers to this hosted service using xEpan.