science

XOXO (microformat)

XOXO (microformat) 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 XOXO (microformat) rather than just read about it. In short: XOXO (eXtensible Open XHTML Outlines) for web syndication is an XML microformat for outlines built on top of XHTML. Developed by several authors as an attempt to reuse XHTML building blocks instead of inventing unnecessary new XML elements/attributes, XOXO is based on existing conventions for publishing outlines, lists, and blogrolls on the Web.

Key takeaways

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

Reference excerpt

XOXO (eXtensible Open XHTML Outlines) for web syndication is an XML microformat for outlines built on top of XHTML. Developed by several authors as an attempt to reuse XHTML building blocks instead of inventing unnecessary new XML elements/attributes, XOXO is based on existing conventions for publishing outlines, lists, and blogrolls on the Web. The XOXO specification defines an outline as a hierarchical, ordered list of arbitrary elements. The specification is fairly open which makes it suitable for many types of list data. E.g. the more semantic version of the S5 presentation file format is based upon XOXO.

XML format The XML elements in an XOXO document are:

<ol class="xoxo"> <ul class="xoxo"> The ordered list and unordered list are the root elements of XOXO. They may contain the class attribute with the value xoxo. They are also used as containers for outline items. They may have the attribute compact="compact" to indicate state of whether child items are visible. <li> Represents an item in the outline. May contain an ordered list or unordered list element to contain child items which themselves may do so as well. <a> Represents a hyperlink for an item in the outline. Possible attributes include: a title attribute to indicate additional information; a type attribute to indicate the MIME type of the link destination; a rel attribute to indicate the link resource's relationship to this outline (e.g. using XFN); and/or a rev attribute to indicate the relationship of this outline to the linked resource (e.g. using VoteLinks). <dl> May contain any number of arbitrary properties using <dt> (definition term) and <dd> (definition description) elements.

Example XOXO uses play list specification presentation directory blogroll

See also XHTML Microformat XFN OML OPML S5 file format XBEL

External links XOXO specification xoxo.py Open source Python library for XOXO outlines "outliner.js — Open source XOXO outline editor". Archived from the original on 2022-11-26. Retrieved 2005-08-11.

Worked examples

Example 1 — a first encounter with XOXO (microformat)

Start with the simplest possible case. Write down what XOXO (microformat) 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 XOXO (microformat) 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 XOXO (microformat) 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 XOXO (microformat)

In research: XOXO (microformat) 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 XOXO (microformat) 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: XOXO (microformat) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Microformats, Semantic HTML, Web syndication formats, so understanding it makes those chapters shorter.
In everyday life: Look for XOXO (microformat) 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 XOXO (microformat) in 20 minutes

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

Frequently asked questions

What is XOXO (microformat) in simple terms?

Why does XOXO (microformat) 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 XOXO (microformat)?

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 XOXO (microformat).