Elements that can be included along with data characters inside the content model of the <self-uri> element.
This parameter entity is currently set as a null string, i.e., there is no string content. However, a customization module
could redefine this parameter entity, thereby adding elements to the <self-uri> element.
<!ENTITY % self-uri-elements
Journal Publishing Tag Library NISO JATS Draft Version 1.1d2