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[xsl] Reading from and writing to the same URI (XTRE1500)
Subject: [xsl] Reading from and writing to the same URI (XTRE1500) From: Steven Grossman <sgrssmn@xxxxxxxxx> Date: Tue, 14 Nov 2006 09:34:55 -0800 (PST) |
I'm having trouble understanding the restriction that one cannot read from and write to the same URI during a single transformation. This prohibits the common (i would think) 'use' case where one wants to overwrite a file with a slightly modified version of the same file. For example, one wants to update a list of contacts with one more contact. To preempt the argument that ordering becomes an issue (namely, did the read occur before or after the write), I'll reiterate a sentiment posted in a thread to this forum. Put a stake in the ground and say that all writes occur at the end of the transformation. All reads see the documents prior to modification. Is there a flaw in this reasoning that necessitated this restriction? (Please note that I am *not* advocating writing to the same document more than once in a single transformation. That inherently relies upon order of execution.) Steven ____________________________________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited
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