The algebraic analog of compact complex spaces with a sufficiently large field of meromorphic functions. I

Abstract analogs are constructed for $n$-dimensional compact complex spaces with $n$ algebraically independent meromorphic functions; they are called by the author minischemes. The present part of the work contains a number of theorems on morphisms and monoidal transformations of schemes, as well as the definition of minischeme and of a morphism of minischemes and some consequences of these definitions, including the construction of the product of minischemes.