Board Thread:New Features/@comment-24739709-20150929231108/@comment-28798705-20161204161744

my point was defalt tag was closed, before the format tag, the color change cant effect outside code flow.

default content is generated from a coded conditional result 'this or that'. In effect a placeholder if no data condition exists.

Class declaration should work for empty tag and wont interfere with none classed images. last part of most parsers are for this type of use ie to catch an unhandled evaluation.

study 'ifexist' or similar parsers at Wikipedia/Wikimedia. Classes may not even be needed for your purpose. You don't seem to want default but an alternative to an empty data field.