KIPI PicasaWeb plugin store Item ID in this XMP tag when image are download/uploaded from/to web service.

src/properties.cpp

@@ -188,6 +188,7 @@ namespace Exiv2 {
     extern const XmpPropertyInfo xmpKipiInfo[] = {
         { "EnfuseInputFiles",       N_("Enfuse Input Files"),        "Text",     xmpText, xmpExternal, N_("The list of files processed with Enfuse program through ExpoBlending tool.") },
         { "EnfuseSettings",         N_("Enfuse Settings"),           "Text",     xmpText, xmpExternal, N_("The list of Enfuse settings used to blend image stack with ExpoBlending tool.") },
+        { "picasawebGPhotoId",      N_("PicasaWeb Item ID"),         "Text",     xmpText, xmpExternal, N_("Item ID from PicasaWeb service.") },
         // End of list marker
         { 0, 0, 0, invalidTypeId, xmpInternal, 0 }
     };