A data model explicitly determines the structure of data. Data models are specified in a data modeling notation, which is often graphical in form. A data model can be sometimes referred to as a data structure, especially in the context of programming languages. Data models are often complemented by function models, especially in the context of enterprise models.
The Association Montessori Internationale (AMI), founded by Maria Montessori in 1929, maintains Montessori educational principles and disseminates Montessori education throughout the world.
Started in 1915 by Ezra Whitman, an engineer who led the design and construction of the city's Montebello Water Treatment Plant, the firm remains focused on public works, with about 95 percent of its $114 million in revenue sourced to federal, state and local projects, according to managing partner Joseph Makar.