In the interests of averting the dizziness of <gap> and <supplied>, I
recommend <sic> and <space> for capturing the semantics of spaces reserved
for capitals yet to be inscribed.

The attributes for <space> include "resp" which "indicates the individual
responsible for identifying and measuring the space". As well, one can
capture the "extent" as any measured quantity e.g. number of letters. And
for dimension there is "dim" whose values are (horizontal | vertical).

http://www.tei-c.org/P4X/ref-SPACE.html

For initial capitals that are supplied, I recommend <c> with "rend"
attribute.


For capitals that are to be associated with a reserved space, <corr>
element enclosing a <c> element. And with ID/IDREFS connect the <corr>
element with a corresponding <sic> element.


Examples


<c rend="initial">T</c>he opening sentence in which the capital is
supplied in the source ...

<sic id="s1" corresp="cor1"><space extent="1_letter"/></sic>
<corr id="cor1" corresp="s1"><c rend="initial">T<c/></corr>
hese other sentences have room  ...



--
Francois Lachance, Scholar-at-large
http://www.chass.utoronto.ca/~lachance/jardin

2005 Year of Comparative Connections. DIA: Comparative connections? LOGZ:
Connection, first. Comparison, next. DIA: Check. Comparable ways of
connecting. LOGZ: Selection outcomes, first. Comparative Connections,
next.