Credit Microsoft for being an excellent creator of platforms. Its Windows,
Microsoft .NET, and Microsoft Office products are industry standards, and the
company has made important inroads with Microsoft IIS, Windows Mobile, and many
other products. On the Web, Microsoft Internet Explorer (IE) is the de facto
standard, despite a slew of formalized Web standards, and even Microsoft's oft-criticized
ActiveX technologies are widely deployed worldwide. With regard to Web rendering
technologies, Microsoft hasn't been much of a presence, but the company hopes
to change its standing with a new technology called Microsoft Silverlight, which
is essentially a platform for developing rich applications that run in the browser.
Here's what you need to know about Silverlight.
What It Is; What It Isn't
Although often compared to Adobe Flash technology, which provides basic animation,
UI, and data display features, Silverlight is in fact dramatically more powerful
and extensible. Consider just the ability to deliver video over the Web: With
Flash, developers are stuck with the low-resolution, low-quality video users
have come to associate with such video sites as YouTube. But Silverlight provides
access to HD, full-fidelity video at a reliable 700Kbps of bandwidth. Microsoft
will even host up to 4GB of video for users at no cost.
However, Silverlight isn't just about video.
In conjunction with the release of this technology, Microsoft is also opening up new APIs for
its various Windows Live services, including
Live Search, Virtual Earth, and Windows Messenger. As a result, developers who target Silverlight will be able to access Microsoft's large
and growing collection of back-end services
from their Web applications.
From a programming perspective, Silverlight applications utilize .NET managed
code and can be expressed in Extensible Application Markup Language (XAML),
the XML-based markup language that Microsoft created for Windows Vista. XAML
applications can be written using a simple text editor, or more preferably by
using a graphical tool that creates XAML code, and are thus open for inspection
by Web search engines and other online tools. This is another point that contrasts
with Flash, which is essentially a closed "black box" environment. And because
Silverlight is being targeted at Apple's Safari and Mozilla's Firefox browsers
as well as IE, it should work on just about any computing platform, including
Macintosh and Linux. (Most Silverlight developers will of course create their
applications in Windows.)
Ultimately, what really sets Silverlight apart
is the quality of the UIs you can create and the
continued use of XAML, which is particularly
easy to parse and automate with various
designer tools. Whether it will translate into
real-world success is hard to know. Certainly,
Microsoft's track record with cross-platform
browser add-ins has been poor at best.
Recommendation
If you're looking at rolling out Web applications that will access back-end
data and you're working in a primarily Microsoft-based shop, do take a look
at Silverlight. The first version should be shipping by the time you read this,
but Microsoft is already offering an early public beta of the next version and
will likely continue to update the technology.
In the current online world, in which many sites are transitioning into so-called
Web 2.0 applications, Silverlight is only one of several competing technologies.
But it offers numerous advantages for those who are wedded to Windows on the
server and development sides. It's definitely worth investigating. For more
information, visit the Silverlight Web site at http://silverlight.net/GetStarted
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