An entity is a reusable fragment of the document content that can be reused multiple times by reference.
Unlike other editors, Serna allows you to edit entity references in-place and shows them as regular content.
Figure 1. Internal entity in the Editing Window and ContentMap.
Figure 2. External entity in the Editing Window and ContentMap.
<!ENTITY legal-notice SYSTEM "legal-notice.xml">
Entities can be declared in a DTD file that is external to the edited document (the external DTD subset), or declared in the edited document (the internal DTD subset). The declarations of internal and external entities in the internal DTD subset can be changed and removed.
Inserting symbols common for all documents
In Serna, you can insert arbitrary Unicode symbols selecting them in the Insert Symbol Dialog. The variety of offered symbols does not depend on the current document type.
Inserting template-specific symbols
You can insert symbols that are listed as internal entities in the template-specific external DTD subset.