Collaborative ontology building requires both knowledge integration and knowledge reconciliation. Wiki@nt is an ontology building environment that supports collaborative ontology development. Wiki@nt is based on OSHOQP(D), an extension to SHOQ(D) with O (partial order on axioms) and P (localized axioms in package ) constructors. Wiki@nt supports integration and reconciliation of multiple independently developed, semantically heterogeneous, and very likely inconsistent ontology modules. A web browser based editor interface is provided, with features to support team work, version control, page locking, and navigation.