This is the absolute minimum meaningful syntax I could think of: nouns and determiners that make a noun phrase. This is almost, but not quite, a subset of the real RGL abstract syntax.

Read my blog post for more explanations.

You don't need to do these in order to understand the rest of the tutorial, but I'm hoping it would be fun for you to do it.

• Make a concrete syntax for a new language
• Add something to the abstract syntax: for instance, adjectives ("big dog"), more nouns, other determiners ("my dog", "5 dogs").