instruction are there:

diagram are mostly editable with draw.io website

Name		Name	Last commit message	Last commit date
Latest commit History 26 Commits
Makefile		Makefile
README.md		README.md
Rplots.pdf		Rplots.pdf
amia.cls		amia.cls
amia.log		amia.log
biblio.bib		biblio.bib
demo.png		demo.png
diagram_sequence.pdf		diagram_sequence.pdf
graph1.R		graph1.R
graph1.pdf		graph1.pdf
graph2.R		graph2.R
graph2.pdf		graph2.pdf
i2b2-fhir.aux		i2b2-fhir.aux
i2b2-fhir.bbl		i2b2-fhir.bbl
i2b2-fhir.blg		i2b2-fhir.blg
i2b2-fhir.log		i2b2-fhir.log
i2b2-fhir.pdf		i2b2-fhir.pdf
i2b2-fhir.tex		i2b2-fhir.tex
overall.pdf		overall.pdf
overall.xml		overall.xml
sequence_diagram.pdf		sequence_diagram.pdf
sequence_diagram.xml		sequence_diagram.xml