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RE: Bad programmers use recursion, xslt (Offtopic...)

• To: "'Michele Vivoda'" <idmichele@y...>,"'Tatu Saloranta'" <cowtowncoder@y...>,<xml-dev@l...>
• Subject: RE: Bad programmers use recursion, xslt (Offtopic...)
• From: "Michael Kay" <mike@s...>
• Date: Mon, 27 Mar 2006 12:17:56 +0100
• In-reply-to: <20060327101200.89390.qmail@w...>
• Thread-index: AcZRhwCmlmf2hMygTO6YPW+OARHE6gAB8utQ

> Not sure if related but I found in my experience 
> that sometimes splitting a single XSLT1.0
> transformation 
> into two transformations could bring good if 
> not big performance improvements.

I agree. Not only performance improvements, but improvements in the
readability, maintainability and reusability of the code. 

> if one does not define very well the 
> "xml interfaces" to communicate between stylesheets
> (the structure of the xml trees input of each 
> stylesheet) it becomes very difficult to understand, 
> document  and debug them.

Agreed: there's a lot to be said for defining a schema for each intermediate
document in the pipeline, and using schema-aware stylesheets to trap the
errors as soon as they occur, rather than allowing them to propagate to
later stages in the pipeline. 
> 
> I tried to find something that allows you to
> do multiple transformations in a declarative
> way but I did not find much.
> 

There's a W3C activity starting up to define a pipeline processing language
which will make it possible to do this in a portable way.

Meanwhile there are pipeline processors for example from Orbeon and from
Markup Technologies (http://www.markup.co.uk/), and other people are using
tools like Ant.

Michael Kay
http://www.saxonica.com/

• References:
  • Re: Bad programmers use recursion, xslt (Offtopic...)
    • From: Michele Vivoda <idmichele@y...>

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