The difference is the quotes around W3C::STRING. It's a function call in your first snippet, and a string literal in the second.

By the way, using <c>...</c> around code to post is an easy way to handle posting code on PerlMonks. It saves you from putting all the line breaks and escaping characters such as <.

In reply to Re: Passing values to external packages by ikegami
in thread Passing values to external packages by genyded

Title:
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