I'm trying to turn my notebooks into stand-alone packages and I'm

running into problems with Notation package. In particular, I'm using

Notation package and InfixNotation, and when I save notebook as a

package, I get "ParsedBoxWrapper"'s and definitions using infix

notation fail to match, for example.

InfixNotation[ParsedBoxWrapper["\[Element]"], MyElement]

sum[a_ \[Element] list_, expr_] := ...

sum[a_\[Element] {1,2,3},a]

This fails to match when in .m file, but works fine in .nb file. My

question is -- how should I package "sum" so that it matches correctly

both in packages and in notebooks?