1. A computer program product comprising a machine-readable medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising: determining, at a bulk metadata service, whether a stored definition of a plurality of metadata properties relating to generation of a user interface has previously been received from a service consumer of the user interface, the user interface incorporating content of a plurality of business objects, the definition further comprising identities of a plurality of nodes of the plurality of business objects corresponding to the plurality of metadata properties; instantiating, if the stored definition has previously been received, a bulk service interface for each of at least one service provider providing the plurality of business objects, the bulk service interface querying the stored definition and accessing, in a bulk metadata access process, dynamic metadata required for instantiation of the plurality of business objects; initiating a default bulk services access process if the stored definition has not previously been received, the default bulk services access process querying an existing dynamic metadata access interface of each of the plurality of business objects to retrieve the dynamic metadata from each of the plurality of business objects; and generating an instance of the user interface using at least one of the dynamic metadata accessed by the bulk service interface and the dynamic metadata retrieved by the default bulk services access process.