I've personally tried them all and love how they operate! I was even considering creating an entire website in them about a year ago, but I think the technology is too new for older browsers to support them and so cross-compatibility becomes an issue which is nothing new. Worth looking into now though as I do believe they'll be a big part of the web-development industry in a few years.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.

Come on folks :) Somebody must have an opinion on these apart from voting! I can personally see the web taking off in this direction in the next couple of years. They're definitely the way to be going if you're wanting to stick around in the web business for a good few years! There's already an XML based querying language that is similar to MySQL in its approach and implementation. Of course TalkPHP will never be obsolete because server-side languages, I believe, will always be around due to the fact that there's no point in transferring such code to the client for both bandwidth and security issues.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.

I've never used any of those languages. But you could stimulate us by writing a nice introduction to one of those languages you like the most ;)!

I can't say im an expert (as i'm far far from it) but i have had a tinker with them, but a tutorial would be most appreciated :)

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)

I've used XSLT, XQuery & XPath at school.

They teach XSLT at schools these days? Used to be VB6 in my days, and HTML in Dreamweaver, and I thought they'd moved to Java recently. Which is definitely a big step up.

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The man who comes back through the Door in the Wall will never be quite the same as the man who went out.

Turbo Pascal and Delphi for me in my school days.

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)

I have created a class to assist me in this task [ Quixml::Quick Xml and Xsl for PHP ]

I use a browser detection mechanism to determine if they support native XSLT processing, and if it's the case, I send directly the XSL style sheet with the XML to the browser.

I find this method to bring me a more organized way of designing my applications.
More portable too, as my class allows me to create "rendering sets" that can be switched on the fly, for different output medias (think mobile devices here).

I used this method of development in my last job, as an Oracle dev, where an interface was rendered to the browser that way.
I found it so elegant that I decided to move my dev process under PHP to use the same procedure.

I find XML totally useless. I think that using XSLT for anything besides altering the document so it is readable by different systems is pointless, and that the entire language package including XBL is useless as of now with browser compatibility issues that aren't even worth working around.

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Signatures are nothing but incriminating.

I used some XSLT with XPath at work, I see its pretty smart for templates and datastorage in many cases but Im not sure if I should adapt it into my PHP applications

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