Parent Field

The parent field mapping is defined on a child mapping, and points to the parent type this child relates to. For example, in case of a blog type and a blog_tag type child document, the mapping for blog_tag should be:

{
    "blog_tag" : {
        "_parent" : {
            "type" : "blog"
        }
    }
}

The mapping is automatically stored and indexed (meaning it can be searched on using the _parent field notation).