--- /dev/null
+include "Simantics/All"\r
+include "Spreadsheet/All"\r
+\r
+sheetSourceContribution :: Resource -> <ReadGraph> [Variable]\r
+sheetSourceContribution sheet = [variable $ uriOf sheet]\r
+\r
+sheetSourceContributionLabeler :: Variable -> <ReadGraph> String\r
+sheetSourceContributionLabeler variable = "Sheet"\r
+
\ No newline at end of file