The Free Software Foundation once thought of as one of their high priority projects to be "developing a free, high-quality and fully functional set of libraries and programs that implement the PDF file format and associated technologies to the ISO 32000 standard."
自由软件基金会曾认为他们的一个高优先级计划“提供自由、高质量和全功能的一组软件库及程序实现PDF文件格式及ISO 32000标准的相关技术”。