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# CDM v2.0 Discussion

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_This is a site to discuss possible changes to the [CDM v1.4](http://wp5.e-taxonomy.eu/cdm/v14/) to go into CDM v2.0_

_See also Component C5.80 - Review of CDM v.1 and model for descriptive data in CDM v.2_

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## Taxonomic Data

### Separation Of Taxonomic Concept And Taxonomic View

There is a need to separate taxonomic concept information from taxonomic view information resulting in the new classes TaxonomicView and TaxonNode.

![](CdmTaxonomicView:taxonomicView.png)

See [taxonomic view](http://dev.e-taxonomy.eu/trac/wiki/CdmTaxonomicView) for further information.

## DESCRIPTIVE DATA - PROPOSED REVISIONS

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1. Media extends IdentifiableEntity

- addition of a ComparableTo method

- deletion of the redundant attribute 'rights'

2. TermBase extends IdentifiableEntity

There was redundancy with 'implements Comparable<T>' in OrderedTermBase and 'implements Comparable<IdentifiableEntity>' in IdentifiableIdentity.

- I erased « implements Comparable<T> » dans OrderedTermBase

- I completed it with a 'ghost' method CompareTo(Object)

public int compareTo(Object o) {

		return 0;

	}

- I added the same 'ghost' CompareTo(Object) method to the following classes: BibtexEntryType, DerivationEventType, PreservationMethod, RightsTerm, NamedAreaType, ReferenceSystem, Feature, FeatureTree, MeasurementUnit, StatisticalMeasure, TextFormat, AnnotationType, ExtensionType, Language, MarkerType, TermVocabulary, InstitutionType

3. adding OnlyApplicableIf / InapplicableIf to FeatureNode 

private Set<State> onlyApplicableIf = new HashSet<State>();

private Set<State> inapplicableIf = new HashSet<State>();

with the associated get, add, remove methods.

These attributes are not direct equivalent for onlyApplicableIf and inapplicableIf in SDD as they are attached directly to the child feature rather than the parent feature, which allow having different inapplicability rules for each child feature.

4. Creation of the WorkingSet class

public class WorkingSet<S extends DescriptionBase> extends AnnotatableEntity {

	…

private Set<Representation> representations = new HashSet<Representation>();

...

private FeatureTree descriptiveSystem;

...

private Set<S> descriptions = new HashSet<S>();

…

}

5. Completion of IidentificationKey interface

public interface IIdentificationKey {

	    public Set<NamedArea> getGeographicalScope();

	    public void addGeographicalScope(NamedArea geographicalScope);

	    public void removeGeographicalScope(NamedArea geographicalScope);

	    public Set<Taxon> getTaxonomicScope();

	    public void addTaxonomicScope(Taxon taxon);

	    public void removeTaxonomicScope(Taxon taxon);

	    public Set<Scope> getScopeRestrictions();

	    public Set<Taxon> getCoveredTaxa();

	    public void addCoveredTaxon(Taxon taxon);

	    public void removeCoveredTaxon(Taxon taxon);

}

I removed 'representations' as MultiAccessKey and PolytomousKey inherit it from their hierarchy. I added it to MediaKey (former IdentificationKey) under the name of keyRepresentations in order not to mix with the media representations.

6. Modification of IdentificationKey in accordance (and renaming it to MediaKey with all the necessary modifications in concerned classes)

public class MediaKey extends Media implements IIdentificationKey{

	…

	private Set<Taxon> coveredTaxa = new HashSet<Taxon>();

…

	private Set<NamedArea> geographicalScope = new HashSet<NamedArea>();

…

	private Set<Taxon> taxonomicScope = new HashSet<Taxon>();

…

	private Set<Scope> scopeRestrictions = new HashSet<Scope>();

…

	private Set<Representation> keyRepresentations = new HashSet<Representation>();

…

}

7. Creation of the class MultiAccessKey

public class MultiAccessKey extends WorkingSet implements IIdentificationKey{

	...

	private Set<Taxon> coveredTaxa = new HashSet<Taxon>();

	...

	private Set<Taxon> taxonomicScope = new HashSet<Taxon>();

	...

	private Set<NamedArea> geographicalScope = new HashSet<NamedArea>();

	...

	private Set<Scope> scopeRestrictions = new HashSet<Scope>();

}

8. Creation of PolytomousKey

public class PolytomousKey extends FeatureTree implements IIdentificationKey{

	...

	private Set<Taxon> coveredTaxa = new HashSet<Taxon>();

	...

	private Set<Taxon> taxonomicScope = new HashSet<Taxon>();

	...

	private Set<NamedArea> geographicalScope = new HashSet<NamedArea>();

	...

	private Set<Scope> scopeRestrictions = new HashSet<Scope>();

}

9. Addition of the attribute 'result', 'question' and 'taxon' to FeatureNode so that a FeatureTree can store the identification path in the case of a polytomous key.

private DescriptionElementBase result;

private Set<Representation> questions = new HashSet<Representation>();

private Taxon taxon;