Adding enum bindings

Author: cmungall

linkml_model/model/schema/meta.yaml

@@ -618,7 +618,6 @@ slots:
       - BasicSubset
 
   pv_formula:
-    domain: enum_expression
     range: pv_formula_options
     description: >-
       Defines the specific formula to be used to generate the permissible values.
@@ -1543,7 +1542,7 @@ slots:
     domain: slot_definition
     range: presence_enum
     inherited: true
-    description: if true then a value must be present (for lists there must be at least one value). If false then a value must be absent (for lists, must be empty)
+    description: if PRESENT then a value must be present (for lists there must be at least one value). If ABSENT then a value must be absent (for lists, must be empty)
     comments:
       - if set to true this has the same effect as required=true. In contrast, required=false allows a value to be present
     status: unstable
@@ -2098,6 +2097,32 @@ slots:
     in_subset:
       - SpecificationSubset
 
+  bindings:
+    domain: element
+    range: enum_binding
+    multivalued: true
+    inlined: true
+    description: >-
+      A collection of slot bindings that specify how a slot can be bound to a permissible value
+      from an enumeration.
+    in_subset:
+      - SpecificationSubset
+
+  binds_value_of:
+    domain: enum_binding
+    range: string
+    description: >-
+      A path to a slot that is being bound to a permissible value from an enumeration.
+    in_subset:
+      - SpecificationSubset
+
+  obligation_level:
+    range: obligation_level_enum
+    description: >-
+      The level of obligation or recommendation strength for a metadata element
+    in_subset:
+      - SpecificationSubset
+
 
   # -----------------------------------
   # Slots for type definition
@@ -2520,6 +2545,7 @@ classes:
       - generation_date
       - slot_names_unique
       - settings
+      - bindings
     see_also:
       - https://en.wikipedia.org/wiki/Data_dictionary
     close_mappings:
@@ -2673,6 +2699,24 @@ classes:
     slots:
       - enum_uri
 
+  enum_binding:
+    description: >-
+      A binding of a slot or a class to a permissible value from an enumeration
+    slots:
+      - range
+      - obligation_level
+      - binds_value_of
+      - pv_formula
+    slot_usage:
+      range:
+        range: enum_definition
+    in_subset:
+      - SpecificationSubset
+    mixins:
+      - extensible
+      - annotatable
+      - common_metadata
+
   match_query:
     description: >-
       A query that is used on an enum expression to dynamically obtain a set of permissivle values via a query that 
@@ -2772,6 +2816,7 @@ classes:
       - range
       - range_expression
       - enum_range
+      - bindings
       - required
       - recommended
       - inlined
@@ -3192,3 +3237,28 @@ enums:
         meaning: skos:broaderMatch
       NARROW_SYNONYM:
         meaning: skos:narrowerMatch
+
+  obligation_level_enum:
+    rank: 10
+    description: >-
+      The level of obligation or recommendation strength for a metadata element
+    permissible_values:
+      REQUIRED:
+        description: >-
+          The metadata element is required to be present in the model
+      RECOMMENDED:
+        aliases:
+          - ENCOURAGED
+        description: >-
+          The metadata element is recommended to be present in the model
+      OPTIONAL:
+        description: >-
+          The metadata element is optional to be present in the model
+      EXAMPLE:
+        description: >-
+          The metadata element is an example of how to use the model
+      DISCOURAGED:
+        description: >-
+          The metadata element is allowed but discouraged to be present in the model
+    in_subset:
+      - SpecificationSubset