markdown

+ tags can be added in the markdown text, but they should *not* be
indented. The paragraph parser should recognize /tagged/ blocks and
simply ignore them.

+ ` < ' if something starts with this, please don't parse the
following entity.

+ automatic conversion of & --> &amp; according to the context.
  autometic conversion of < --> &lt; according to the context.

  inside spans or blocks markdown always encodes the > &amp; & to
  correponding thingies explained above.