Dear all,
The following example doesn't work for me:
\setupbodyfont[xits]
\starttext
\math{x\mathextensible{2194}{hello}{}y}
\math{x\mathextensible{21FE}{hello}{}y}
\math{\char21FE}
\stoptext
I found the symbol which I needed there:

Am 24.04.2014 um 18:24 schrieb Elspeth McGullicuddy
elspethmcgullicu...@gmail.com:
Dear all,
The following example doesn't work for me:
\setupbodyfont[xits]
\starttext
\math{x\mathextensible{2194}{hello}{}y}
\math{x\mathextensible{21FE}{hello}{}y}
\math{\char21FE}
\stoptext
I found

Thanks for the answer,
I wanted to use to use the mechanism described in about.pdf for
extensible arrows with possibly text above, under...
I've had a look at the xits-math.tma.
Though U+2194 and U+21FE are both arrows, U+2194 has an horizontal
part field in contrast to U+21FE how hasn't.
So I

Am 24.04.2014 um 23:06 schrieb Elspeth McGullicuddy
elspethmcgullicu...@gmail.com:
Thanks for the answer,
I wanted to use to use the mechanism described in about.pdf for
extensible arrows with possibly text above, under...
I've had a look at the xits-math.tma.
Though U+2194 and U+21FE

In about.pdf on can see that U+21FE (rightarrowtriangle) is eligible
for use with \mathextensible.
When one look at the code for \mathextensible in math-stc.mkvi, one
can see there is a mechanism of fallback.
So, since the character is implemented in xits, there might be a way
to have