science

XMDP

XMDP 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 XMDP rather than just read about it. In short: XHTML Meta Data Profiles (XMDP) is a format for defining metadata 'profiles' or formats in a machine-readable fashion, while also enabling people to see a description of the definition visually in a web browser. XMDP definitions are expressed in XHTML (or possibly HTML).

Key takeaways

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

Reference excerpt

XHTML Meta Data Profiles (XMDP) is a format for defining metadata 'profiles' or formats in a machine-readable fashion, while also enabling people to see a description of the definition visually in a web browser. XMDP definitions are expressed in XHTML (or possibly HTML). Examples of applications that use XMDP include XFN and hCard.

Example

To apply, use the profile attribute in the head element of your document:

Where URL denotes the full address of your XMDP profile resource.

See also microformats XHTML Friends Network hCard XHTML

External links XFN 1.1 Profile Microformats home page drx: XMDP (archived version) drx: XMDP

Worked examples

Example 1 — a first encounter with XMDP

Start with the simplest possible case. Write down what XMDP 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 XMDP 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 XMDP 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 XMDP

In research: XMDP 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 XMDP 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: XMDP is common in secondary-school and first-year university syllabi. It links to neighbouring topics Microformats, World Wide Web stubs, XHTML, so understanding it makes those chapters shorter.
In everyday life: Look for XMDP 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “XMDP” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study XMDP in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what XMDP 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 XMDP out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is XMDP in simple terms?

Why does XMDP 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 XMDP?

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 XMDP.