Somehow, I found the following logic logical: take a list of
items, each item has a type T. Concatenate all items by
casting each type T to a string, append the separator and
append to each other.
Yes, that would have been a much simpler rule. In fact, that's the way it
was for a while. But it caused problems, both in terms of backwards
compatibility and in terms of what users found natural, so we changed it.
The difficulties related to the strong expectation that strings produced by
adjacent xsl:text/xsl:value-of instructions would be concatenated directly.
Michael Kay
http://www.saxonica.com/
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