Setting an attribute to (no value)

You can remove an attribute value by setting it to nothing:

$MyAttr=; 

Note the semicolon is not quoted, even for attribute type like strings. You can also use a empty string for string types:

$MyString=""; 

Only the first of these syntaxes also allows attributes that use prototype or preference settings to re-inherit these again. See about resetting inheritance for more detail.

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