TSRef - TypoScript Reference
3.1.3. "... /stdWrap":
When a datatype is set to "type /stdWrap" it means that the value is parsed through the stdWrap function with the properties of the value as parameters.
Example:
pixels /stdWrap: Here the value should be set to pixels and parsed through stdWrap.
In a real application we could do like this:
.pixels.field = imagewidth
.pixels.intval = 1
This example imports the value from the field "imagewidht" of the current $cObj->data-array. But we don't trust the result to be an integer so we parse it through the the intval()-function.