More sophisticated markup techniques

There are some additional markup techniques that can make a document easier to read. In particular, we often want useful cross-references between class definitions. We may also want cross-references between sections and topics within a document.

In pure RST (that is, without Sphinx), we need to provide proper URLs that reference different sections of our documents. We have three kinds of references:

• Implicit references to section titles: We can use `Some Heading`_ to refer to the Some Heading section. This will work for all the headings that docutils recognizes.

• Explicit references to targets: We can use target_ to reference the location of _target in the document.

• Inter-document references: We have to create a full URL that explicitly references a section title. Docutils will translate section titles into all lowercase, replacing the punctuation with -. This allows us to create a reference to a section title in an external document like this: `Design...