Languages that are more easily parsed are likely to be more amenable to automated translation and artificial intelligence applications. The vast majority of correct Vorlin sentences can be parsed using a set of about two dozen context-free rules. These rules have been developed using the PC-PATR parser available from the Summer Institute of Linguistics. PC-PATR was chosen for this project because it is free and is available in Macintosh, DOS, Windows and Unix versions. As with any text file, you might need to convert them to Windows or Mac format to get them to work properly on your computer.
Comments begin with a semi-colon.
In this case, we have a comment in English explaining that this rule will define the structure of a vocative phrase. This might be followed by a noun phrase. The vocative phrase might end with a sentence-final particle. This rule states that a prepositional phrase consists of one or two prepositions followed by a noun phrase. To learn more about how these syntax rules are written, read the PC-PATR documentation.