The phrase "as a foundational" is correct and usable in written English.
It can be used when discussing something that serves as a base or essential element for a concept, theory, or structure.
Example: "As a foundational principle of our organization, integrity guides all our decisions and actions."
Alternatives: "as a fundamental" or "as a core".
Iran's leaders celebrate the takeover every year as a foundational event of the Islamic revolution.
In France, even the rightwing parties revere the partisans, the resistance, as a foundational moment of contemporary France.
Along with Newtonian mechanics and thermodynamics, Maxwell's electromagnetism took its place as a foundational element of physics.
His focus is on an obscure, Reagan-era executive order that serves as a foundational set of rules for the intelligence apparatus.
Booker went on to make a case for love as a foundational American value, the force that binds atomized individuals into a more formidable collective.
The member churches of the EKD adopted the Declaration of Barmen, with its expression of the communalities of the Lutheran and Reformed traditions, as a foundational statement.
Professor Stocking described his objective as redefining the accepted view of anthropology's "origin story," one centered on Tylor as a foundational theorist.
So are the Putney debates remembered as a foundational moment of British democracy, in the way that every grade-schooler in the US knows the Declaration of Independence to be of American democracy?
Over the last half-century or so, however, the book — a vast exploration of the themes of fraudulence and authenticity in art and human relationships — has come to be regarded as a foundational postmodern novel.
To interpret it as a foundational change, ushering something new and unknown, is to diminish the past, to unduly singularize Mr. Obama's achievement and to raise unrealistic expectations about his presidency.
Arguments have been advanced for and against category theory as a foundational framework.
