# Semantic Annotation Semantic annotation adds lightweight marks that declare the role or meaning of content rather than merely its visual appearance. In Bryant's writer markup, braces identify a sentence as a quote and a leading plus identifies a passage. The marks preserve normal writing flow while giving software enough intent to extract addressable units, derive assets, and retain source relationships. Related: [[wiki/Content Atomization|Content Atomization]], [[wiki/Executable Markdown|Executable Markdown]], [[wiki/Domain-Specific Language|Domain-Specific Language]].