Subject: Re: [xsl] How do you ensure that data is not altered/corrupted in atransformation? From: "Roger L Costello costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 19 May 2023 09:10:17 -0000 |
Hi Alan, > hashing can be used to verify that the data > in instance A is identical to instance B That is exactly what is needed. It must be ensured that the data -- 12000 feet -- is not altered/corrupted during the transformation. From an XSLT perspective, what is the best way to ensure that data is not altered/corrupted? /Roger From: Alan Painter alan.painter@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Sent: Friday, May 19, 2023 4:56 AM To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: [EXT] Re: [xsl] How do you ensure that data is not altered/corrupted in atransformation? An XML schema validation would do the trick in this case.B If your schema requires "alt" rather than "altitude", schema validation would catch this. I don't see "hashing" as a solution in this case .. hashing can be used to verify that the data in instance A is identical to instance B .. but if you are doing a transformation, then you are probably "changing" something hence the before/after instances would not be identical. On Fri, May 19, 2023 at 10:36b/AM Roger L Costello mailto:costello@xxxxxxxxx <mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: Hi Folks, In certain domains loss of life may occur if data is altered/corrupted in any way. Suppose you write an XSLT program which transforms this: <alt>12000 feet</alt> to this: <altitude>12000 feet</altitude> How do you ensure that the data -- 12000 feet -- was not altered/corrupted in the transformation? I have heard of people doing a hash on the data prior to the transformation, a hash on the data after the transformation, and then comparing the hashes. Is that what you would do when lives are on the line? What is your recommendation? /Roger http://www.mulberrytech.com/xsl/xsl-list http://lists.mulberrytech.com/unsub/xsl-list/673357 ()
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