Document presentation qualified by conditions evaluated on rendering

A facility for rendering a document is described. The facility performs layout for the document. After performing layout for the document, the facility performs rendering for the document. The rendering performed by the facility for the document includes evaluating at least one condition specified in connection with authoring the document. 描述了种用于渲染文档的设施。该设施对文档执行布局。在对该文档执行布局之后，设施对该文档执行渲染。由该设施对该文档执行的渲染包括评估结合编写文档来指定的至少个条件。