Re: [xml-dev] Tool converts records to XML

[Shlomi Fish <shlomif@shlomifish.org>]

Hi Roger and all,

On Tue, 15 Nov 2022 20:14:36 +0000
Roger L Costello <costello@mitre.org> wrote:

> Michael Kay wrote:
> 
> > the "Barnes & Noble" problem. The number #1 blunder 
> > when writing XML is not to bother escaping `<` and `&` 
> > if they happen to occur in your input.  
> 
> Ouch!
> 
> You are right Michael.
> 
> Upon reflection, I realized that there is an even nastier problem lurking
> than the problem of converting & and < in the input record data into &amp;
> and &lt; in the output XML. 
> 
> My actual record data is encoded in Windows 1252. The records contain many
> occurrences of the degree symbol. In Windows 1252 the degree symbol is a
> single byte (hex B0) but in UTF-8 the degree symbol is two bytes (hex C2 B0).
> My AWK program doesn't convert the one byte Windows 1252 degree symbol to the
> two byte UTF-8 degree symbol. In fact, to be correct every Windows 1252
> character with an encoding above hex 0F must be converted to two bytes, and
> my AWK program doesn't do any of that.
> 
> Eeeeeeek!
> 
> For fun, I also wrote an XSLT program to convert the records to XML. My
> program uses the unparsed-text() function, which does all character
> conversions behind-the-scene (i.e., you have no idea that all the Windows
> 1252 characters above hex 0F are being converted to two byte UTF-8
> characters).
> 
> To implement the character conversions in AWK would be a monumental task.
> 
> Eeeeeeek!
> 
> Lesson Learned: Don't use AWK to convert records to XML.
> 

Re AWK , perl , and POSIX, see:

* https://shlomifish.livejournal.com/1991.html

* https://twitter.com/shlomif/status/1542047869989011457

* https://github.com/ekalinin/github-markdown-toc/pull/104/files

> Bummer!
> 
> /Roger
> 
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-- 

Shlomi Fish       https://www.shlomifish.org/
https://github.com/shlomif/validate-your-html - Validate Your HTML

If Chuck Norris is disappointed by you not following his advice, he’ll survive.
On the other hand, you will not.
    — https://www.shlomifish.org/humour/bits/facts/Chuck-Norris/

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