:The interpretation is fairly straightforward; the interpreter goes through the object representation of the input, generating the appropriate CSS and HTML as it goes. The interpreter keeps track of the current item's location in the hierarchy to place it at the proper level of the navigation tree. The interpreter generates unique class identifiers for the levels as it encounters them, generates the CSS for the level (if any), and consequently inserts it into a separate stylesheet created specifically for the purpose of the nav bar. Items are assigned classes for their level and all the levels above them. This allows inheritance to take place entirely using CSS's own inheritance mechanisms. Individual submenu overrides, consequently, are also entirely handled by CSS as far as inheritance is concerned (i.e. an override inherits from the prototypes of its level and all the levels above it and then overrides/adds additional formatting of its own that affects it and its direct children & siblings).:The interpreter itself does only minimal error-checking. If errors occurred during parsing, they can be inspected via JavaScript after the parse is complete.