XSL 格式化对象规范是 W3C 的正式建议书，通常称其为 XSL-FO，XSL-FO 定义了许多 XML 标记，这些标记描述了应如何渲染内容。-XSL formatted object model is the W3C's formal proposal, usually called XSL-FO, XSL-FO definition of the many XML markings, these markers should describe the content of exag