2. The method of claim 1 , wherein obtaining the expanded set of semantic constructions as the semantic corpus for the domain comprises: determining effective leaf levels of the ontology; for a semantic construction of the set of domain-specific semantic constructions, identifying sets of effective leaf level semantic tokens, each set comprising effective leaf level tokens below a corresponding semantic token in the semantic construction in the hierarchical levels; and expanding the set of domain-specific semantic constructions into the semantic corpus by replacing each semantic token in the set of domain-specific semantic constructions with any of the corresponding identified effective leaf level semantic tokens.
2. The method of claim 1 , wherein obtaining the expanded set of semantic constructions as the semantic corpus for the domain comprises: determining effective leaf levels of the ontology; for a semantic construction of the set of domain-specific semantic constructions, identifying sets of effective leaf level semantic tokens, each set comprising effective leaf level tokens below a corresponding semantic token in the semantic construction in the hierarchical levels; and expanding the set of domain-specific semantic constructions into the semantic corpus by replacing each semantic token in the set of domain-specific semantic constructions with any of the corresponding identified effective leaf level semantic tokens. 3. The method of claim 2 , wherein the ontology further comprises a set of customized tokens and a symbolic token representing any unknown linguistic element.