reference to newest CHOP + export to OWL/XML instead of OWL functional

2021-1/sphn_ontology_2021-1.ttl

-@prefix : <https://biomedit.ch/rdf/sphn-ontology/sphn> .
+@prefix : <https://biomedit.ch/rdf/sphn-ontology/sphn#> .
 @prefix dc: <http://purl.org/dc/elements/1.1/> .
 @prefix atc: <https://biomedit.ch/rdf/sphn-resource/atc/> .
 @prefix dct: <http://purl.org/dc/terms/> .
@@ -21,7 +21,7 @@
                                               owl:versionIRI <https://biomedit.ch/rdf/sphn-ontology/sphn/2021/1> ;
                                               owl:imports <http://snomed.info/sct/900000000000207008/version/20210304> ,
                                                           <https://biomedit.ch/rdf/sphn-resource/atc/2021/3> ,
-                                                          <https://biomedit.ch/rdf/sphn-resource/chop/2020/3> ,
+                                                          <https://biomedit.ch/rdf/sphn-resource/chop/2021/1> ,
                                                           <https://biomedit.ch/rdf/sphn-resource/icd-10-gm/2021/1> ,
                                                           <https://biomedit.ch/rdf/sphn-resource/loinc/2.69/1> ,
                                                           <https://biomedit.ch/rdf/sphn-resource/ucum/2021/1> ;

README.md

@@ -5,7 +5,7 @@ The SPHN ontology project contains the SPHN RDF schema.
 ## SPHN RDF schema
 
 The schema is derived from the SPHN Dataset accessible at: [https://sphn.ch/document/sphn-dataset/](https://sphn.ch/document/sphn-dataset/).
-The schema is provided in turtle (.ttl) and OWL functional syntax (.owl).
+The schema is provided in turtle (.ttl) and in OWL/XML (.owl) formats.
 
 The external terminologies referenced in the SPHN RDF schema are accessible upon request to [dcc@sib.swiss](mailto:dcc@sib.swiss).