rng-pending-contents
rng-pending-contents is a variable defined in `rng-valid.el
'.
Its value is nilDocumentation: Text content of current element that has yet to be processed. Value is a list of segments (VALUE START END) positions in reverse order. VALUE is a string or nil. If VALUE is nil, then the value is the string between START and END. A segment can also be nil indicating an unresolvable entity or character reference.