Update metadata-validation.md

tech/docs/dmc/metadata-validation.md

@@ -1,12 +1,19 @@
 # Metadata validation (ETS/ATS)
 
 - metadata conformance evaluation
+  - conformance is a indicator of quality?
 - linkage evaluation
+  - linkage to other metadata records
+  - linkage to data/services. [geohealthcheck](https://geohealthcheck.org) is an interesting tool to monitor availability of spatial services/resources. 
 - metadata quality evaluation
+  - identify a level of completeness for a metadata file (match against a set of expectations from a SoilWise perspective)
+  - governance is of interest, what do you do if a record scores low? notify the owner, try to auto-improve, tag with low score, exclude from the catalogue 
 - data quality evaluation
 - suggest improvements on metadata to users
 
+Geocat has developed a linkage checker for iso19139:2007 metadata for INSPIRE geoportal, available at [icat](https://github.com/GeoCat/icat), which includes link checks in ows capabilities
+
 - connections to data source, catalogue, processing
 - technologies used:
 - responsible person:
-- participating:
+- participating: