1) Google structured data for instance layout and show all instance layout.
Google has some set of "structured data" and depend of micro data type - they have different fields. In our Joomla CCK - ypu may create any type of information. So and Micro data will different.
Most best way add micro data to jomla CCK
- add google micro data to show one instance: Please in every instance create 2 "text area" fields "Micro-data1" and "Micro-data2" - in these field at time instance edit - please add your micro date/
And to "show instance layout" please add these fields. 1 field you may add to "show instance layout" with instance details description, other to "show instance layout" with instance short description
- add google micro data to show all instances: You may add to "Show all instances" layout "custom field" - and there add your micro data
2) open graph meta tags
You may use our joomla social sharing module
3) <link rel="canonical" href="xxx.com" />
In jomla CCK
you may add this also to "micro data1" field as in point1