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Re: How to stream-process non-XML text using unparsed

Subject: Re: How to stream-process non-XML text using unparsed-text-lines( ) ?
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 24 Jul 2014 21:44:59 -0000
Re:  How to stream-process non-XML text using  unparsed
On Thu, Jul 24, 2014 at 10:07 AM,  <mike@xxxxxxxxxxxx> wrote:
> let $x := unparsed-text-lines(...)
> return ($x[1000], $x[10])
> Saxon implements $x using a data structure called a MemoClosure where items
> from the input are read on-demand, and then remembered. Reading $x[1000]
> will cause the first 1000 items to be read and retained in memory; reading
> $x[10] finds that the tenth item is already in memory

 Maybe not store the 1000 lines, except the last, but just create a
map N --> offset(N) for the Nth line, N < 1000

This way, if we store what was read (or if it already is conveniently
accessible by offset), then we will retrieve it again only on demand.
Reminds me of <xsl:key> and the key() function -- and maybe something
like key() for streamed data could be designed this way -- obviously
requiring two (partial/on-demand) passes.

Just thinking aloud about this.

Dimitre Novatchev
Truly great madness cannot be achieved without significant intelligence.
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Never fight an inanimate object
To avoid situations in which you might make mistakes may be the
biggest mistake of all
Quality means doing it right when no one is looking.
You've achieved success in your field when you don't know whether what
you're doing is work or play
To achieve the impossible dream, try going to sleep.
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I finally figured out the only reason to be alive is to enjoy it.

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