* doc/org.texi: Document how :var introduces code block dependencies.
---
doc/org.texi | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/doc/org.texi b/doc/org.texi
index 6791570..dda922e 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -13211,6 +13211,15 @@ include anything in the Org mode file that takes a
@code{#+NAME:},
@code{#+BEGIN_EXAMPLE} blocks, other code blocks, and the results of other
code blocks.
+When a reference is made to another code block, the referenced block will be
+evaluated whenever needed, in order to supply its value to the referencing
+block. If the referenced block is cached (see @ref{cache}), its value will
+be reused if possible, instead of being re-calculated. If the referring code
+block is cached, its hash value will depend on the value of all the code
+blocks it references. This system can thus be used to create a system of
+as-needed re-evaluation among code blocks similar to that provided by
+@uref{http://yihui.name/knitr/, knitr} or Sweave.
+
Argument values can be indexed in a manner similar to arrays (see @ref{var,
Indexable variable values}).
--
1.8.2
