Adobe Experience Manager Forms

I don't find "com.adobe.cq.sightly.WCMUse" package entry in adobe and also in Maven Repository , can someone please help me about finding pom entries for this packageNote :I can use crxde light to import "com.adobe.cq.sightly.WCMUse" and build a package, but I don't want that option, I want to impor...

While creating a dropdown list in my form I noticed a field called "Items Load Path". Can this field be used to provide a url from which it loads the options available in a dropdown list? Where would the URL reside, and how can I put values in that URL? Can someone please show an example?