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Re: [xsl] position last and attributes
Subject: Re: [xsl] position last and attributes From: Ihe Onwuka <ihe.onwuka@xxxxxxxxxxxxxx> Date: Thu, 20 Sep 2012 13:31:18 +0100 |
On Thu, Sep 20, 2012 at 1:24 PM, Wolfgang Laun <wolfgang.laun@xxxxxxxxx> wrote: > On 20/09/2012, Ihe Onwuka <ihe.onwuka@xxxxxxxxxxxxxx> wrote: >> On Thu, Sep 20, 2012 at 12:30 PM, Andrew Welch <andrew.j.welch@xxxxxxxxx> >> wrote: >>>> <A 1st="1" second="2" third="3" fourth="4" fifth="5"/> >>>> >>>> now tell me what are the first and last attributes of A. >>> >>> Ok, but first (as hopefully this will explain it): >>> >>> 1. What is the position() of @third ? >>> >>> 2. Why do: >>> >>> @second/position() >>> >>> @third/position() >>> >>> both return 1? >>> >> >> No. I'm moving on from the orthogonal conversation to one that is >> conducted on my terms since you are the one trying to understand me. >> >> <A 1st="1" second="2" third="3" fourth="4" fifth="5"/> >> >> 1. what are the first and last attributes of A. >> 2. what are A/@*[1] and A/@*[last()] >> >> Is there a definitive answer to 1 (I say no). > > Correct, because the question does not make sense: you are asking > about non-existing properties of a *set*. > >> Are there definitive answers to 2 (Well a processor will always give >> you one if the set is not empty). > > No - we know that this is implementation dependent. > >> >> Is A/@* a representation of the attributes of A. (I say yes). > > It has the same cardinality. All values of this representation are > contained in the other representation. There is a bijection between these two. > >> Is A/@* a faithful representation of the attributes of A? > > No: it has lost the set-ness. > >> >> If A/@* is a faithful representation of the attributes of A why does >> it yields answers to questions that the original representation can't >> answer. > > Because the transformation has added new properties. > So it is not a faithful representation of the attributes of A >> >> So what if A/@* is not a faithful representation. Should I present the >> answers it gives me as a universal truth. > > No, it's the truth about the transformation process from one to the other. > Agreed. So at essence this thread is about the nuance between information derived from a representation and information derivable from the real thing.
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