1. A method of providing supplemental functionalities to an executable program, the method being implemented by a computer system comprising one or more processors executing one or more computer program instructions that, when executed, perform the method, the method comprising: causing an executable program associated with an ontology to be run, wherein the ontology comprises information indicating attributes for a set of applications; obtaining a domain-specific ontology, wherein the domain-specific ontology is within a domain of interest; using the ontology and the domain-specific ontology to generate application metadata for the executable program, wherein the application metadata defines one or more functionalities of an application of the set of applications that is within the domain of interest; and providing the application metadata as input to the executable program, wherein the application metadata, at least in part, causes the one or more functionalities of the application to be made available via the executable program.