此链接适用于支持 PDF 的开发人员工具：
http: //www.adobe.com/devnet/pdf.html
具体来说，DarkLighting 提到的 1.7 参考是：
http ://wwwimages.adobe.com/content/dam/Adobe /en/devnet/acrobat/pdfs/pdf_reference_1-7.pdf
该文件的第 3.2.4 节似乎解决了您的问题：
3.2.4Name Objects
A name object is an atomic symbol uniquely defined by a sequence of characters.
Uniquely defined means that any two name objects made up of the same sequence of characters
are identically the same object. Atomic means that a name has no internal structure;
although it is defined by a sequence of characters, those characters are not considered
elements of the name.
A slash character (/) introduces a name. The slash is not part of the name but is
a prefix indicating that the following sequence of characters constitutes a name.
There can be no white-space characters between the slash and the first character in
the name. The name may include any regular characters, but not delimiter or white-space
characters (see Section 3.1, “Lexical Conventions”). Uppercase and lowercase letters are
considered distinct: /A and /a are different names. The following examples are valid
literal names:
/Name1
/ASomewhatLongerName
/A;Name_With−Various***Characters?
/1 . 2
/$$
/@pattern
/. notdef
因此，/JT /Cn /V 等似乎是 PDF 字典对象中的命名对象（由双尖括号 << ... >> 标识）。在您的示例中，所有这些“未识别”元素都包含在字典对象中。有关此元素的更详细说明，请参见第 3.2.6 节。
也可以想象，这些是 2.2.8 中描述的 PDF 可扩展性选项的一部分：
Additionally, PDF provides means for applications to store their own private
information in a PDF file. This information can be recovered when the file is
imported by the same application, but it is ignored by other applications.
Therefore, PDF can serve as an application’s native file format while its
documents can be viewed and printed by other applications. Application-specific
data can be stored either as marked content annotating the graphics objects in
a PDF content stream or as entirely separate objects unconnected with the PDF content.
基本上，如果不逐个检查并对其进行解码（通过自行开发的自动化工具或手动），很难说出所有各种非标准对象的定义。
关于 /GoTo 评论，我不同意 DarkLighting。PDF 渲染器应在采取任何操作之前阅读字典的全部内容。PDF 规范没有说明顺序很重要——只是声明了“ /S /GoTo ”和“ /D < [some kinda destination] >”。在您的示例中，它说转到第 9 页，位置 0。