Constant Expression1 min readCreated: 01 Aug 2025Updated: 01 Aug 2025Constant is the expression that returns a constant value. ConstantExpression syntaxConstantExpression : String | Number ;Pdfql Documentation NavigationPdfQL languageSkip stageFilter stageSelectMany stageFirstOrDefault stageSelectMany stageFirst stageSelect stageMap stageTake stagePdfQL ExpressionBinary ExpressionLambda ExpressionConstant ExpressionNew ExpressionInstance Method Call ExpressionPdfQL keywordSelector tokenPdfQL outputJson