Add support for parsing variables

This adds a reader flag and serdi option for extending a syntax with support
for SPARQL-like variables, for storing things like patterns or simple queries.

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/serdi.1 b/doc/serdi.1
index c834ce42..b89bfba7 100644
--- a/doc/serdi.1
+++ b/doc/serdi.1
@@ -139,6 +139,13 @@ Display version information and exit.
 Write output to the given
 .Ar filename
 instead of stdout.
+.Pp
+.It Fl x
+Support parsing variable nodes.
+Variables can be written in SPARQL style, for example
+.Dq ?var
+or
+.Dq $var .
 .El
 .Sh EXIT STATUS
 .Nm