<p dir="auto">Very helpful in storing additional info per property. for example a display name or some other application specific annotations for a property</p>
<p dir="auto">A mapping can have a _meta element - but it only keeps it if declared on the top level.<br>
When using the _meta to annotate a mapping, or keeping custom configuration on it, or using it for some binding - a lot of times besides the top level you also need more custom data on a field level. So you need the mapping to keep also _meta nodes defined under fields.</p>