This view of the Emma B. Andrews TEI XML file is provided using the TEI Boilerplate styling solution.
From the TEI Boilerplate website:
Location of the TEI XML file that Boilerplate is using: eba_tei_boilerplate_view/content/emma_teibp_xsl.xml
TEI Boilerplate (http://teiboilerplate.org/) is a lightweight solution for publishing styled TEI (Text Encoding Initiative) P5 content directly in modern browsers. With TEI Boilerplate, TEI XML files can be served directly to the web without server-side processing or translation to HTML. Our TEI Boilerplate Demo illustrates many TEI features rendered by TEI Boilerplate.