Group items tagged

a third option developed using lessons learned from microformats and RDFa, and designed to be integrated into HTML5 itself: microdata.

“Adding microdata” to your page is a matter of adding a few attributes to the HTML elements you already have.

So where is the real information? It’s in the <dd> element, so that’s where we need to put the itemprop attribute. Which property is it? It’s the name property. Where is the property value? It’s the text within the <dd> element. Does that need to be marked up? the HTML5 microdata data model says no, <dd> elements have no special processing, so the property value is just the text within the element.

Besides the data- prefix, the name of a valid custom data attribute must contain only letters, numbers, hyphen (-), dot (.), colon (:) or underscore (_). It cannot contain capital letters.

The schema.org vocabulary can be used with both Microdata or RDFa 1.1 Lite syntax, and it has types for Event, Organization, Person, Product, Review, AggregateRating, Offer and hundreds of others.

Once more, the iPhone recognises type="tel", only this time it goes one step further and completely changes the keyboard to the standard phone keyboard, as shown on the left in Figure 6. In addition to the iPhone, some Android devices (such as HTC Desire, shown on the right in Figure 6) also display a numeric keyboard for type="tel". That’s pretty handy, don’t you think? Nice, big keys for entering a phone number help you to get that big, nasty form completed quickly.

In contrast to Opera’s implementation, the iPhone (Figure 8) and some Android devices (such as HTC Desire, shown on the right in Figure 6-13) simply render the field as a standard text box but optimize the keyboard for easy input.

MP3 was also covered by a bunch of patents, so you had to license it for a fair bit of money; those patents have finally expired now. Ogg and Vorbis have always been free (and the reference implementation available under an LGPL and later BSD license).

The :required attribute works on radio buttons. If you put required on one radio button (or all), that particular group of radio buttons will be required. On checkboxes, makes each individual checkbox required (to be checked).

Possible values are: off: The user must explicitly enter a value into this field for every use, or the document provides its own auto-completion method. The browser does not automatically complete the entry. on: The browser is allowed to automatically complete the value based on values that the user has entered during previous uses, however on does not provide any further information about what kind of data the user might be expected to enter. name: Full name. honorific-prefix: Prefix or title (e.g. "Mr.", "Ms.", "Dr.", "Mlle"). given-name: First name. additional-name: Middle name. family-name: Last name.