"cornerstone element" is correct and is often used in written English.
It is usually used to refer to an important element or component which forms the basis of something larger or more complex, or something which is essential and indispensable. For example: The early education of children has been identified as a cornerstone element of a successful society.
Provenance represents the cornerstone element which will enable information consumers to assess information quality, which will play a fundamental role in the continued evolution of the Web.
"SAP believes that a cornerstone element of innovation is the diversity of those who participate in the creative process and the perspectives they bring to the table, including the perspective of those on the autism spectrum," she says.
HTML5 is a cornerstone element of the strategy, Polar Mobile CEO and founder Kunal Gupta told me in an interview, but he also stressed that it's not the only piece.
However, forward-thinking companies like SAP have realized that a cornerstone element of innovation is the diversity of those who participate in the creative process and the different perspectives they bring to the table - including individuals with autism.
Spins in solids are cornerstone elements of quantum spintronics1.
The unsavory implication here, of course, is that, for the cornerstone elements of Trumpism, that triumph _was _a national humiliation, that the image of an African-American receiving the deference and regard that the Presidency entails invalidated these Americans' understanding of what the U.S. is, or at least what it is supposed to be.
Duncan: Of character's four cornerstone elements, which one seems to be the greatest challenge for most people?
The storage of available soil fertility elements is a cornerstone of the sustainability of forest elemental cycles at the local scale, as well as to those on the global scale.
European Space Agencies fifth cornerstone mission BepiColombo includes a 'Surface Element' to land a scientific payload on the surface of Mercury.
Continuity of care is often described as the "cornerstone of care" and an "essential element" of general practice [ 3].
This element of conscious choice is the cornerstone of my recovery.
