12.7.6 Special characters in DocBook export

Special characters that are written in TeX-like syntax, such as \alpha, \Gamma, and \Zeta, are supported by DocBook exporter. These characters are rewritten to XML entities, like α, Γ, and Ζ, based on the list saved in variable org-entities. As long as the generated DocBook file includes the corresponding entities, these special characters are recognized.

You can customize variable org-export-docbook-doctype to include the entities you need. For example, you can set variable org-export-docbook-doctype to the following value to recognize all special characters included in XHTML entities:

     "<!DOCTYPE article [
     <!ENTITY % xhtml1-symbol PUBLIC
     \"-//W3C//ENTITIES Symbol for HTML//EN//XML\"
     \"http://www.w3.org/2003/entities/2007/xhtml1-symbol.ent\"
     >
     %xhtml1-symbol;
     ]>
     "