science

WTVML

WTVML is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand WTVML rather than just read about it. In short: WTVML is an XML-based and WML-derived content format designed to allow web site operators to easily develop and deploy Interactive TV services, typically it reduces the time taken for web site operators to create a TV Site, and results in the Site being deployable on a larger number of devices, and is capable of being automatically validated, tested and transformed. WTVML was originally developed by Ian Valentine an…

Key takeaways

WTVML belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WTVML to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WTVML from memory before moving on to harder problems.

Reference excerpt

WTVML is an XML-based and WML-derived content format designed to allow web site operators to easily develop and deploy Interactive TV services, typically it reduces the time taken for web site operators to create a TV Site, and results in the Site being deployable on a larger number of devices, and is capable of being automatically validated, tested and transformed. WTVML was originally developed by Ian Valentine and Patrick Sansom in a company called WapTV. After demonstrating the ability to develop Interactive TV services using web infrastructures and XML, and successfully deploying them to existing TV set-top-boxes over dial up modems, the company was acquired by BSkyB. The technology was first used to launch Sky's interactive betting service on December 6, 2000, and later became the basis of a large number of "red button" channel portals and internet based interactive services. The format follows a strict XML syntax (DTD) that has been developed in response to multiple user requirements by BSkyB, and is now being enhanced by Miniweb Interactive. The format was standardized through ETSI as TS 102 322. WTVML has the potential to unify the Interactive TV content creation industry, which has been hampered by proprietary "middlewares" and a lack of browser standards. The fragmentation of technologies available to build Digital TV platforms has meant that typical web site operators have had no common content format available to them to allow them to develop their TV Site once, and deploy it unchanged across multiple networks and devices. Some newer set-top boxes (particularly IPTV devices) use various versions of HTML browsers. Many of these have proprietary TV extensions, and different deployment characteristics, which result in untested services being deployed unfaithfully or worse with run-time errors. Due to the need for explicit layouts, as well as other reasons, many designers attempting to create TV Style services using HTML browsers need to make extensive use of JavaScript, which has the result of further inhibiting interoperability, and requires manual testing of a service before it is deployed by the majority of networks, thus essentially closing a network from open internet access. WTVML services can be automatically and dynamically transformed into various forms of HTML/JS/CSS, making them compatible with traditional web browsers as well as WTVML native browsers, and allowing the network operator to manage his platform specific features independently from the standard used by the web site authors. WTVML follows a web 2.0 style model, in that complete applications are DTD driven, allowing TV Style services to be created without the use of Script. Between 2000 and 2008 the industry, including the DVB,

Worked examples

Example 1 — a first encounter with WTVML

Start with the simplest possible case. Write down what WTVML claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to WTVML before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about WTVML ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of WTVML

In research: WTVML appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses WTVML in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: WTVML is common in secondary-school and first-year university syllabi. It links to neighbouring topics Interactive television, so understanding it makes those chapters shorter.
In everyday life: Look for WTVML outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study WTVML in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WTVML means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain WTVML out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WTVML in simple terms?

Why does WTVML matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study WTVML?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on WTVML.