@@ 1434,6 1434,7 @@ availability of packages:
@item --search=@var{regexp}
@itemx -s @var{regexp}
+@cindex searching for packages
List the available packages whose name, synopsis, or description matches
@var{regexp}. Print all the meta-data of matching packages in
@code{recutils} format (@pxref{Top, GNU recutils databases,, recutils,
@@ 1477,6 1478,19 @@ that deal with printed circuit boards; removing the angle brackets
around @code{board} would further add packages that have to do with
keyboards.
+And now for a more elaborate example. The following command searches
+for cryptographic libraries, filters out Haskell, Perl, Python, and Ruby
+libraries, and prints the name and synopsis of the matching packages:
+
+@example
+$ guix package -s crypto -s library | \
+ recsel -e '! (name ~ "^(ghc|perl|python|ruby)")' -p name,synopsis
+@end example
+
+@noindent
+@xref{Selection Expressions,,, recutils, GNU recutils manual}, for more
+information on @dfn{selection expressions} for @code{recsel -e}.
+
@item --show=@var{package}
Show details about @var{package}, taken from the list of available packages, in
@code{recutils} format (@pxref{Top, GNU recutils databases,, recutils, GNU