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   Re: [xml-dev] extrernal entities - part 2

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Robert Koberg wrote:

> Why are you using XML? Seems like you have a fundamental 
> misunderstanding (OK, you have corrected some extreme beginner 
> mistakes) of what XML is and what is is good for...

ultimately we have to translate a variety of document formats into 
commands for different printers. so i normalise the documents to an xml 
format and then use xsltproc to produce targeted outputs. not the only 
solution, but a very neat one.

i guess i could put it into the database as well and have it output the 
target info. lots of ways to skin this cat.

as for extreme beginner mistakes - xml is very big (in some ways) and as 
each branch is approached the opportunity for extreme <aside>the most 
overworked word in english at the moment</aside> beginner mistakes is 
always there. i expect to make them for many years yet ;)


> -Rob
> Rick Marshall wrote:
>> <?xml version="1.0"?>
>> <!DOCTYPE label [
>>        <!ELEMENT vpn EMPTY>
>>        <!ATTLIST vpn code ENTITY #REQUIRED>
>>        <!NOTATION VPN SYSTEM "/usr/local/app/shoeman/bin/vpn">
>>        <!ENTITY codex SYSTEM "1234" NDATA VPN>
>>        ]>
>> <label_file><vpn code="codex" /></label_file>
>> ok, a bit more background here. i am trying to overcome a somewhat 
>> classic "late-binding" problem.
>> we get requests to print labels. the request come as text files that 
>> are converted to xml and stored. the text file has everything we need 
>> to print the labels except for some local info (essentially our 
>> product number). sometime between receiving the files and actually 
>> printing the labels all the data bits are filled in and we do have 
>> the required product number. this can be identified from a code 
>> supplied by the customer.
>> the code above is a simplified version just to illustrate the point.
>> when we produce the final output (zebra printer codes in this case) 
>> we need to include our product code. so what i want to do is embed in 
>> the xml a call to a function in our system that, when passed the 
>> customer code, will return our product code.
>> everything i've read suggests that the above snippet should work 
>> (assuming /usr/local/app/sheoman/bin/vpn is executable and returns 
>> something).
>> and here is the simplified stylesheet:<xsl:stylesheet version="1.0" 
>> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>>        <xsl:output method="text"/>
>>        <xsl:template match="/">
>>                <xsl:apply-templates match="label_file"/>
>>                </xsl:template>
>>        <xsl:template match="label_file">
>>                <xsl:text>
>> XX</xsl:text>
>>                <xsl:apply-templates match="vpn"/>
>>                </xsl:template>
>>        <xsl:template match="vpn">
>>                <xsl:text>
>> YY </xsl:text>
>>                <xsl:value-of select="@code"/>
>>                <xsl:text> ZZ</xsl:text>
>>                </xsl:template>
>>        </xsl:stylesheet>
>> and the output:
>> XX
>> YY codex ZZ
>> as you can see the entity "codex" is not  being replaced by the call 
>> to /usr/local/...
>> i can devise alternatives, but they would not be xml solutions and 
>> that has other problems downstream.
>> ps if this is the correc tsolution then it is a good reason to hang 
>> on to dtds.
>> rick
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fn:Rick  Marshall
tel;cell:+61 411 287 530


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