4.2 Backwards compatibility
The first widely distributed version of Xy-pic was version 2 (from release 1.40 to release 2.6). A special compatibility mode is used automatically if the old style of loading is used (using files namedxypic.tex
and xypic.sty
). You can also mix old and new diagrams in a
document if you load as described in section 1.1 and
add the declaration \xyoption
{v2}
. This provides almost full
backwards compatibility: the following are the only known exceptions:
- Automatic "shortening" of arrow tails by
|
<<
break was a bug and has been "fixed" so it does not work any more. Fix: Put a|
<\hole
break before it as described in section 2.3. - The release 2.6
*
position operator is not available. Fix: Use the:
and::
operators (described in detail in the reference manual [8]). - Using as the target of an arrow command does not work. Fix: Enclose it in braces, i.e., write .
- The old
\pit
,\apit
, and\bpit
commands are not defined. Fix: Use*@{>}
(or\tip
) with variants and rotation. - The even older notation where an argument in braces to
\rto
and the others was automatically taken to be a "tail" is not supported. Fix: Use the supported|
<
... notation.
© Kristoffer H. Rose <krisrose@brics.dk> January 6, 1997 / LaTeX2HTMLv96.1-h