The information needed to build a data model is gathered during the requirments analysis. Although not formally considered part of the data modeling stage by some. methodologies, in reality the requirements analysis and the ER diagramming part of the. data model are done at the same time.
These documents are authoritative and time-tested consensus agreements. Use of the standard AIA documents provides the building owner, the architects and the contractors with a comprehensive and cohesive set of documents for a particular project.
Stored in the IPA format and appended with the .ifa extension, these iOS application files can be initialized to start the application associated to the iOS program file. Apple products implemented with support for executing these IFA files and associated applications include the iPod Touch, iPhone and iPad devices.