Welcome!

Artificial Intelligence Authors: Zakia Bouachraoui, Elizabeth White, Liz McMillan, Pat Romanski, Carmen Gonzalez

RSS Feed Item

Re: Feasibility of "do all application coding in the XMLlangua

Kurt,

In my Flower project (temporarily off-line but it'll be back)
I explored a "third way" relative to what you are talking 
about.


XQuery and XSLT should remain purely functional (aka
declarative).

Non-standard "extension functions" should be avoided
almost always, for at the very least the break portability.
Commonly, extension functions are poorly designed in that
they sneak in non-declarative, sequencing semantics.

Pipelines (e.g. XProc) aren't flexible enough regarding
side effects and flow of control.   For example,
in most pipeline systems, you can't do recursion.

Instead, I invented a kind of "I/O monad" for running
XQuery and XSLT scripts in a kind of continuation passing
style.   A computation (say, in XQuery) returns a 
list of side-effecting operations to perform plus a 
continuation.  The continuation is itself a second
XQuery script.   The monad performs the side-effecting
operations, packages up the results as XML Datums,
and invokes the continuation.   Repeat in a loop
until eventually a "null" continuation is returned.

If you want to add, say, an FFT function -- don't 
bind it into XQuery as an extension function (thereby
dragging in hundreds of thousands of lines of code
including a complete graph-tracing GC where less than
10K lines of code are needed).  Rather, package the
FFT in a web service API:  the I/O Monad calls out to
it and then resumes XQuerying.   The FFT engine
can be same-process or could be remote -- only performance
will differ.

It's then desirable to create syntactic abstraction 
mechanisms over XQuery....

-t



On Wed, 2008-12-03 at 11:08 -0800, Kurt Cagle wrote:
> 
>         > yea, but a lot of people are using it like PHP rather than a
>         replacement for
>         > SQL on XML. It is the way XML DB vendors recommend you make
>         webapps.
>         > Writers/editors (at least the ones I have been reading) seem
>         to think this
>         > is the way to go. It seems like a step backwards.
>         
> 
> Not sure I'd completely agree with that (of course I'm one of the
> writer/editors that's been advocating this approach). If XQuery
> +extensions was purely declarative, then the filter approach works
> fine, but in point of fact one of the most significant changes taking
> place in the XQuery space is the introduction of database modifying
> code. Once that happens, then realistically you do have to think about
> XQuery as being at a minimum part of a processing pipeline and quite
> possibly the only part of that pipeline This changes the dynamic for
> XQuery pretty dramatically, and moreover it does so by reducing the
> processing of a servlet into a complete XML environment.
> 
> However, the key here is again to keep the XQuery as simple (and
> standardized) as possible - There's an interesting recurrent Filter ->
> Sort -> Partition (Page) -> Style pattern that seems to show up over
> and over again in the XQuery I work with, for instance, and XQuery
> works remarkably well when you deliberately keep your systems as
> RESTful as possible.
> 
> Is that the only use for XQuery? No, of course not, but from a web
> development standpoint it is a primary pattern. Like everything else,
> it works best when you avoid inlining XQuery and XML markup (one
> reason that PHP, or most server-side code constructs, can be such a
> pain), but that's a lesson that only seems learned by experience.
>  
> 
> 

Read the original blog entry...

IoT & Smart Cities Stories
Moroccanoil®, the global leader in oil-infused beauty, is thrilled to announce the NEW Moroccanoil Color Depositing Masks, a collection of dual-benefit hair masks that deposit pure pigments while providing the treatment benefits of a deep conditioning mask. The collection consists of seven curated shades for commitment-free, beautifully-colored hair that looks and feels healthy.
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
We all love the many benefits of natural plant oils, used as a deap treatment before shampooing, at home or at the beach, but is there an all-in-one solution for everyday intensive nutrition and modern styling?I am passionate about the benefits of natural extracts with tried-and-tested results, which I have used to develop my own brand (lemon for its acid ph, wheat germ for its fortifying action…). I wanted a product which combined caring and styling effects, and which could be used after shampo...
The platform combines the strengths of Singtel's extensive, intelligent network capabilities with Microsoft's cloud expertise to create a unique solution that sets new standards for IoT applications," said Mr Diomedes Kastanis, Head of IoT at Singtel. "Our solution provides speed, transparency and flexibility, paving the way for a more pervasive use of IoT to accelerate enterprises' digitalisation efforts. AI-powered intelligent connectivity over Microsoft Azure will be the fastest connected pat...
There are many examples of disruption in consumer space – Uber disrupting the cab industry, Airbnb disrupting the hospitality industry and so on; but have you wondered who is disrupting support and operations? AISERA helps make businesses and customers successful by offering consumer-like user experience for support and operations. We have built the world’s first AI-driven IT / HR / Cloud / Customer Support and Operations solution.
Codete accelerates their clients growth through technological expertise and experience. Codite team works with organizations to meet the challenges that digitalization presents. Their clients include digital start-ups as well as established enterprises in the IT industry. To stay competitive in a highly innovative IT industry, strong R&D departments and bold spin-off initiatives is a must. Codete Data Science and Software Architects teams help corporate clients to stay up to date with the mod...
At CloudEXPO Silicon Valley, June 24-26, 2019, Digital Transformation (DX) is a major focus with expanded DevOpsSUMMIT and FinTechEXPO programs within the DXWorldEXPO agenda. Successful transformation requires a laser focus on being data-driven and on using all the tools available that enable transformation if they plan to survive over the long term. A total of 88% of Fortune 500 companies from a generation ago are now out of business. Only 12% still survive. Similar percentages are found throug...
Druva is the global leader in Cloud Data Protection and Management, delivering the industry's first data management-as-a-service solution that aggregates data from endpoints, servers and cloud applications and leverages the public cloud to offer a single pane of glass to enable data protection, governance and intelligence-dramatically increasing the availability and visibility of business critical information, while reducing the risk, cost and complexity of managing and protecting it. Druva's...
BMC has unmatched experience in IT management, supporting 92 of the Forbes Global 100, and earning recognition as an ITSM Gartner Magic Quadrant Leader for five years running. Our solutions offer speed, agility, and efficiency to tackle business challenges in the areas of service management, automation, operations, and the mainframe.