Core package for Plone microdata support
Table of contents
This package simply provides raw support, not really useful on his own. It is intended to be extended by 3rd party projects that want provide microdata support for Plone.
One complete implementation of all instruction below is collective.microdata.event.
Every content type that wanna provide microdata informations needs to provide an adapter for the IMicrodataVocabulary interface. This interface is limited to a single information: an URI to a microdata vocabulary.
Microdata vocabulary are standardized outside HTML 5 specifications, so is possible to have different families of vocabularies. You can also invent your own.
This is automatically done for all Plone content types and catalog objects (for catalog: a new catalog metadata microdata_itemtype will be added to your catalog, saving there the most specific microdata vocabulary URL found).
This is done providing adapters for ISchemaOrgThing interface (that extends IMicrodataVocabulary).
Again: knowing that all your Plone content types are “things” is not very funny, and not a real step forward.
To get microdata information from a content types, your product must provide his own implementation for the IMicrodataVocabulary:
<adapter for="your.products.content.IType" provides="collective.microdata.core.interfaces.IMicrodataVocabulary" factory=".adapter.YourTypeMicrodataProvider" />
Then you need to provide the adapter:
class YourTypeMicrodataProvider(object): implements(IYourMicrodataVocabulary) def __init__(self, content): self.microdata_vocabulary = 'http://your.microdata.uri' # now get data from the content self.microdata_data1 = ...
Then your content’s view must obtain the microdata adapter you defined:
class YourTypeView(BrowserView): ... def microdata(self): return IMicrodataVocabulary(self.context)
Finally your view template must use microdata information:
... <article metal:fill-slot="main" tal:define="microdata view/microdata" itemscope="itemscope" tal:attributes="itemtype microdata/microdata_vocabulary"> ...
The portal catalog microdata_itemtype column will automatically store the content microdata vocabulary URL. Default value is the “Thing” URL (http://schema.org/Thing) but as soon as you provide a more specific adapter, this URL will be replaced with the new ones.
There’s an adapter for getting raw Thing microdata from a catalog brain from all Plone content types, but your 3rd party content type must also provide a more specific ones:
<adapter for="Products.ZCatalog.interfaces.ICatalogBrain" provides="collective.microdata.core.interfaces.IMicrodataVocabulary" factory=".adapter.YourTypeMicrodataBrainProvider" name="http://your.microdata.uri" />
Then you need to provide the adapter:
class YourTypeMicrodataBrainProvider(object): implements(IYourMicrodataVocabulary) def __init__(self, brain): self.microdata_vocabulary = 'http://your.microdata.uri' # now get data from the cataloged content self.microdata_data1 = ...
If you want to provide microdata information also in folder content views (so displaying multiple microdata objects in a single page), you could like to install collective.microdata.contentlisting.
See it’s documentation for further information on how to use this in you product.
To enable it while testing your site, just run the testing Generic Setup profile from your site_setup tool.
Hint: duration checker seems not working properly.
Providing microdata doesn’t ensure that search engines will use it.
- Initial release
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