Track CASE ontology as submodule

References:
* [AC-210] Add validation command to CASE-Utilities-Python

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

.gitmodules

@@ -1,3 +1,6 @@
+[submodule "dependencies/CASE"]
+	path = dependencies/CASE
+	url = https://github.com/casework/CASE.git
 [submodule "dependencies/CASE-Examples-QC"]
 	path = dependencies/CASE-Examples-QC
 	url = https://github.com/ajnelson-nist/CASE-Examples-QC.git

Makefile

@@ -35,6 +35,9 @@ all:
 	$(MAKE) \
 	  --directory dependencies/CASE-Examples-QC/tests \
 	  ontology_vocabulary.txt
+	test -r dependencies/CASE/ontology/master/case.ttl \
+	  || (git submodule init dependencies/CASE && git submodule update dependencies/CASE)
+	test -r dependencies/CASE/ontology/master/case.ttl
 	touch $@
 
 check: \
@@ -50,6 +53,19 @@ clean:
 	  clean
 	@rm -f \
 	  .git_submodule_init.done.log
+	@test ! -r dependencies/CASE/README.md \
+	  || @$(MAKE) \
+	    --directory dependencies/CASE \
+	    clean
+	@# Restore CASE validation output files that do not affect CASE build process.
+	@test ! -r dependencies/CASE/README.md \
+	  || ( \
+	    cd dependencies/CASE \
+	      && git checkout \
+	        -- \
+	        tests/examples \
+	        || true \
+	  )
 	@#Remove flag files that are normally set after deeper submodules and rdf-toolkit are downloaded.
 	@rm -f \
 	  dependencies/CASE-Examples-QC/.git_submodule_init.done.log \

README.md

@@ -86,10 +86,10 @@ This project follows [SEMVER 2.0.0](https://semver.org/) where versions are decl
 
 ## Ontology versions supported
 
-This repository supports the ontology versions that are linked as submodules in the [CASE Examples QC](https://github.com/ajnelson-nist/CASE-Examples-QC) repository.  Currently, the ontology versions are:
+This repository supports the CASE ontology version that is linked as a submodule [here](dependencies/CASE).  Currently, the ontology versions are:
 
-* CASE - 0.4.0
-* UCO - 0.6.0
+* CASE - 0.5.0
+* UCO - 0.7.0
 
 
 ## Repository locations