Microdata
is a specification to embed machine-readable data in HTML documents. Microdata consists of name-value pairs (known as items
) defined according to a vocabulary. A collection of commonly used markup vocabularies are provided by schema.org
.
The basic syntax includes the itemscope
attribute to define an item and the itemprop
attribute to describe one of the item's properties. Types are specified using the itemtype
attribute and can assume values defined in the vocabulary of choice. For instance, schema.org
defines types such as http://schema.org/Person
or http://schema.org/PostalAddress
.
The following example (from Wikipedia ) shows how to use microdata to describe a person:
< section
itemscope
itemtype
=
"http://schema.org/Person"
>
Hello
,
my
name
is
< span
itemprop
=
"name"
> John
Doe
< /
span
> ,
I
am
a
< span
itemprop
=
"jobTitle"
> Graduate
research
assistant
< /
span
>
at
the
< span
itemprop
=
"affiliation"
> University
of
Dreams
< /
span
>
My
friends
call
me
< span
itemprop
=
"additionalName"
> Johnny
< /
span
>
You
can
visit
my
homepage
at
< a
href
=
"http://www.example.com.com"
itemprop
=
"url"
> www
.
example
.
com
< /
a
>
< section
itemprop
=
"address"
itemscope
itemtype
=
"http://schema.org/PostalAddress"
>
I
live
at
< span
itemprop
=
"streetAddress"
> 1234
Peach
Drive
< /
span
>
< span
itemprop
=
"addressLocality"
> Warner
Robins
< /
span
>
< span
itemprop
=
"addressRegion"
> Georgia
< /
span
> .
< /
section
>
< /
section
>
Check the Schema Validator tool to debug your markup and validate it against the supported schema.
