Notes (footnotes or marginal notes) that are tied to a spot in the main text by unusual symbols for which there is no ISO character entity or EEBO-provided character entity should substitute a simple asterisk (*) as the value of the "N" attribute of the <NOTE> tag.
NOTE: We have now (11/02) added character entities for (any kind of) flower symbol and (any kind of) leaf symbol, namely &flower; and &leaf; respectively. So we can now supply an entity name instead of substituting the asterisk (*), but we still have no way of distinguishing between different kinds of flowers or between different kinds of leaves.
We do have a character entity for this first marker, so use it:
<NOTE PLACE="marg" N="&rindx;">Amphy+byanes be thyn+ges dout+full.</NOTE>
If we did not have a character entity for the second marker, we would substitute "*", but we can now use &flower;
<NOTE PLACE="marg" N="&flower;">Fyber is a be|ste of y^e see & y^e land.</NOTE>
Again, if we did not have a character entity for the third marker, we could substitute "*", but this looks like another form of stylized flower, so we will again use &flower;:
<NOTE PLACE="marg" N="&flower;">A Coca+trice wil kyll a man with a loke.</NOTE>
And finally, if we did not have a character entity for this, we could substitute "*", but this looks like a stylized leaf, so we can use &leaf; as the value of the N attribute:
<NOTE PLACE="marg" N="&leaf;">Elle|borum wyll re|store a man to hys sen+ses that hathe lost the~.</NOTE>
Examples are from S10454.