# 1. Scheme tutorial

LilyPond uses the Scheme programming language, both as part of the input syntax, and as internal mechanism to glue modules of the program together. This section is a very brief overview of entering data in Scheme. If you want to know more about Scheme, see http://www.schemers.org.

LilyPond uses the GNU Guile implementation of Scheme, which is based on the Scheme “R5RS” standard. If you are learning Scheme to use with LilyPond, working with a different implementation (or referring to a different standard) is not recommended. Information on guile can be found at http://www.gnu.org/software/guile/. The “R5RS” Scheme standard is located at http://www.schemers.org/Documents/Standards/R5RS/.

其他语言：deutsch, español。
About automatic language selection.

#### LilyPond — Extending v2.18.2 (稳定分支).