# Multi-Surface Serialization Multi-surface serialization encodes one semantic unit in a source form capable of producing more than one controlled output surface. Atomic Markdown's four fields serialize a continuous-prose realization and an autonomous-quotation realization together. Unlike simple format conversion, the surfaces may differ lexically while remaining constrained to the same proposition. Related: [[wiki/Dual-Render Composition|Dual-Render Composition]], [[wiki/Output Projection|Output Projection]], [[wiki/Data Serialization|Data Serialization]], [[wiki/Transformational Extraction|Transformational Extraction]].