let $matches := kwic:get-matches($hit)
    for $ancestor in $matches/ancestor::para | $matches/ancestor::title | $matches/ancestor::td
    return
        kwic:get-summary($ancestor, ($ancestor//exist:match)[1], $config)    

Special rules

The root element will be absorbed, i.e. <root>text</root> becomes "text".

Child elements with the same name are added to an array.

If an element has attribute and text content, the text content becomes a property, e.g. '#text': 'my text'.

In mixed content nodes, text nodes will be dropped.

An empty element becomes 'null', i.e. <e/> becomes {"e": null}.

An element with a single text child becomes a property with the value of the text child, i.e. <e>text</e> becomes {"e": "text"}