The text defines as expertise of organizational members that has not been formally documented.

The answer is tacit knowledge. The tacit knowledge is essential to the entireness of a consciousness of a person, is assimilated largely over association with other people, and necessitates joint or shared activities to be communicated from on to another. Comparable the submerged part of an iceberg it establishes the bulk of what one knows and forms the fundamental framework that makes clear information conceivable.