The phrase "a schema and a" is correct and usable in written English.
It can be used when referring to multiple items or concepts, typically in a list or comparison context.
Example: "In our analysis, we will consider a schema and a model to better understand the data structure."
Alternatives: "a framework and a" or "a diagram and a".
DOI: http://dx.doi.org/10.7554/eLife.09668.024 As also described in our original Discussion, we determined if our approach potentially constitutes a schema and applied a set of criteria that was recently proposed by Ghosh and Gilboa (2014).
Its value is greatly enhanced in two fundamental ways: technologically, by the use of deep metadata and a CV all backed by a schema; and by the human effort of both curating the data as it streams in, and by constantly revising the technology component as the nature of the data and the queries evolves.
Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema, by following a mapping between the two schemas.
Their xText-based tool extracts a KDM data model from a SQL schema and derives a KDM conceptual model containing the term/fact units.
Services accept consumer requests through their service interface using a document schema and execute an operation on the document.
Let (x) be a nonempty set of attribute names later on called as a relational schema and let (mathrm{dom}(a)) denotes a domain of attribute (ain x).
Mechanists also emphasize the distinction between a how-possibly schema and a how-actually-enough schema (Craver and Darden 2013).
Typically, computing mappings between a source schema and a tagging concept involves specifying the semantic types of the source schema elements, i.e., labeling each schema element with a semantically equivalent property in the tagging concept [13].
