Microdata

HTML5 Micradata is something that extends the Microformats and addrsses the shortcomings of Micorformats. Schema.org is one of the most prominent Vocabularies inside the HTML5 Microdata, so not on easy to extend RDF and RDFa, but on prepertiery Schemata that were predefined. The Intention is that Search Engines, Web Crawler and Browser are able to recognize and to understand this schema.org Markup.

• HTML5 Microdata extends Microformats and addresses its shortcomings

• schema.org is the most prominent Microdata Vocabulary

Microdata annoated te Domain Object Model Tree which is inside the HTML5 representation/encoding of the Web Page with name/value paris that are scoped and come from custom Vocabularies that are predefined. All of this is centered around custom Vocabularies which means veryone can define a custon Vocabulary and start embdedding custom Properties into Web Pages. It works with name Value/Pairs, every Microdata Vocabury defines a set of Named Properties and it applies the Concept of Scoping which means Microdata reuse the hierarchical structure of DOM itself.

• Microdata annotates the DOM with scoped name/value pairs from custom Vocabularies

centered around custom Vocabularies:

*anyone can define a Microdata Vocabulary and start embedding custom Properties in thier own Web Pages.

• works with name/value pairs:

every Microdata Vocabulary defines a set of names Properties

• applies Concet of "Scoping":

Microdata re-use the hierarchical Structure of the DOM itself to provide a way to say "all the Properties within this Element are taken from this Vocabulary"

The Microdata Vocabularies are refering to specific things like Categories. What they do is that they use global Attributes within HTML Tags that are used especially for Microdata. The Scope creates a Resource, itemtype means which Vocabulary to use, itemid identifies the Resource. itemproperty is a Property for the Resource and `itemrefer references some other Resources.

HTML5 Microdata specificatio comprises

Microdata Vocabularies [http://data-vocabulary.org/]

Persons, Events, Organizations, Products, Review, Breadcrumbs, Ads, aggregated Reviews, Ad

Microdata Global Attributes

itemscope (created Resource)

• itemtype (applied Vocabulary)

• itemid (identifies Resource)

• itemprop (Property of a Resource)

• itemref (References on other Resources)

If one gives this Information to the Search Engine and the Search Engine reads this one would get the data that one has encoded within the Micrdata Attributes as structured Data.