+We would like to address many thanks to Sebastiano Vigna for maintaining
+LSR web site and database, and the University of Milano for hosting LSR.
+
+Please note that this document is not an exact subset of LSR: some
+snippets come from @file{input/new} LilyPond sources directory, and
+snippets from LSR are converted through @command{convert-ly}, as LSR is
+based on a stable LilyPond version, and this document may be for a newer
+version (see below).
+
+Snippets are grouped by tags; tags listed in the table of contents match
+a section of LilyPond notation manual. Snippets may have several tags,
+and not all LSR tags may appear in this document.