The tag <data:...> is a singleton tag that allows us to print the single value of data point from the parent. In general terms VALUE in <data:VALUE> is an alias to parent variable name. Syntax maybe differ According from which the data is extracted and according to the type of the data

<data:> tag Syntax

Blogger XML Language
<data:VALUE/>

Example Composition of the Syntax

Has single Item
<data:post/>
Has Object Nodes
<data:post.labels/>
Multiple nested objects
<data:post.labels.name/>


data: examples

Form Change
<b:loop values='data:post.labels' var='item'>
    <data:item/>
</b:loop>
In this example we can see variable item, transform to into a singleton <data:item/>.


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