anchor.diff:  The `Taxonomy` entity defines a hierarchy of ``Category``s, with the `Taxonomy` itself acting as the root of each such
   hierarchy.  In many cases the `Taxonomy` will be only two levels deep, in effect defining a enum, eg:
   
  -* `Italian Colours` root classification, with children:
  -** `Italian Colours/Red`
  -** `Italian Colours/White`
  -** `Italian Colours/Green`
  +* "Italian Colours" root classification, with children:
  +** "Italian Colours/Red"
  +** "Italian Colours/White"
  +** "Italian Colours/Green"
   
   However, deeper ``Taxonomy``s are possible, eg:
   
  -* `Sizes`
  -** `Sizes/Small`
  -*** `Sizes/Small/Smallest`
  -*** `Sizes/Small/Smaller`
  -*** `Sizes/Small/Small`
  -** `Sizes/Medium`
  -** `Sizes/Large`
  -*** `Sizes/Large/Large`
  -*** `Sizes/Large/Larger`
  -*** `Sizes/Large/Largest`
  +* "Sizes`
  +** "Sizes/Small"
  +*** "Sizes/Small/Smallest"
  +*** "Sizes/Small/Smaller"
  +*** "Sizes/Small/Small"
  +** "Sizes/Medium"
  +** "Sizes/Large"
  +*** "Sizes/Large/Large"
  +*** "Sizes/Large/Larger"
  +*** "Sizes/Large/Largest"
   
   There can be many such taxonomies; any given domain object can only have one `Classification` per `Taxonomy`.
   hierarchy (but not more than one classification per hierarchy).  Thus, a domain object might be classified as both
  
positive.code: 
  We can then list the taxonomies:
  
  image::https://raw.githubusercontent.com/incodehq/incode-module-classification/master/images/030-list-taxonomies[link="https://raw.githubusercontent.com/incodehq/incode-module-classification/master/images/030-list-taxonomies.png"]
  
  
  which returns the three demo taxonomies, "Size", "Italian Colours" and "French Colours":
  
negative.code: |Yes
  |Yes
  
  .5+| `OtherObject`
  |`/`
  |No
  |No
  