Merge pull request #137 from linkml/ifabsent_documentation

Update ifabsent documentation.

Author: cmungall

linkml_model/model/schema/meta.yaml

@@ -28,7 +28,7 @@ description: |-
   For canonical reference documentation on any metamodel construct,
   refer to the official URI for each construct, e.g.
   [https://w3id.org/linkml/is_a](https://w3id.org/linkml/is_a)
-  
+
 license: https://creativecommons.org/publicdomain/zero/1.0/
 version: 2.0.0
 
@@ -74,7 +74,7 @@ imports:
   - linkml:annotations
 #  - linkml:validation
   - linkml:units
-  
+
 subsets:
   MinimalSubset:
     rank: 0
@@ -412,7 +412,7 @@ slots:
     range: string
     notes:
       -  Use a string from IETF BCP 47
-        
+
   source:
     aliases:
       - origin
@@ -590,7 +590,7 @@ slots:
     in_subset:
       - SpecificationSubset
       - BasicSubset
-      
+
   include:
     description: An enum expression that yields a list of permissible values that are to be included, after subtracting the minus set
     domain: enum_expression
@@ -630,15 +630,15 @@ slots:
     range: string
     in_subset:
       - SpecificationSubset
-    
+
   concepts:
     description: A list of identifiers that are used to construct a set of permissible values
     domain: enum_expression
     range: uriorcurie
     multivalued: true
     in_subset:
       - SpecificationSubset
-    
+
   reachable_from:
     description: Specifies a query for obtaining a list of permissible values based on graph reachability
     domain: enum_expression
@@ -654,7 +654,7 @@ slots:
     range: uriorcurie
     in_subset:
       - SpecificationSubset
-    
+
   is_direct:
     aliases:
       - non-transitive
@@ -975,7 +975,7 @@ slots:
       - one use for this is being able to describe a range using any_of expressions, for example to combine two enums
     in_subset:
       - SpecificationSubset
-    
+
   boolean_slot:
     abstract: true
     multivalued: true
@@ -991,7 +991,7 @@ slots:
       - sh:or
     in_subset:
       - SpecificationSubset
-        
+
   exactly_one_of:
     rank: 103
     description: holds if only one of the expressions hold
@@ -1001,7 +1001,7 @@ slots:
       - sh:xone
     in_subset:
       - SpecificationSubset
-        
+
   none_of:
     rank: 105
     description: holds if none of the expressions hold
@@ -1011,7 +1011,7 @@ slots:
       - sh:not
     in_subset:
       - SpecificationSubset
-        
+
   all_of:
     rank: 107
     description: holds if all of the expressions hold
@@ -1098,7 +1098,7 @@ slots:
     description: a deactivated rule is not executed by the rules engine
     slot_uri: sh:deactivated
     range: boolean
-    
+
   rules:
     slot_uri: sh:rule
     domain: class_definition
@@ -1126,7 +1126,7 @@ slots:
     description: expresses constraints on a group of slots for a class expression
     in_subset:
       - SpecificationSubset
-    
+
   attributes:
     rank: 29
     domain: class_definition
@@ -1218,7 +1218,7 @@ slots:
       - SpecificationSubset
       - BasicSubset
       - RelationalModelProfile
-    
+
   unique_key_slots:
     domain: unique_key
     multivalued: true
@@ -1229,12 +1229,12 @@ slots:
       - SpecificationSubset
       - BasicSubset
       - RelationalModelProfile
-    
+
   slot_names_unique:
     domain: definition
     range: boolean
     description: if true then induced/mangled slot names are not created for class_usage and attributes
-    
+
 
   # -----------------------------------
   # Slot definition slots
@@ -1329,16 +1329,18 @@ slots:
     inherited: true
     description:  |-
       function that provides a default value for the slot.  Possible values for this slot are defined in
-      linkml_runtime.utils.ifabsent_functions.default_library:
+      linkml.utils.ifabsent_functions.default_library:
         * [Tt]rue -- boolean True
         * [Ff]alse -- boolean False
-        * int(value) -- integer value
-        * str(value) -- string value
-        * default_range -- schema default range
         * bnode -- blank node identifier
-        * slot_uri -- URI for the slot
         * class_curie -- CURIE for the containing class
         * class_uri -- URI for the containing class
+        * default_ns -- schema default namespace
+        * default_range -- schema default range
+        * int(value) -- integer value
+        * slot_uri -- URI for the slot
+        * slot_curie -- CURIE for the slot
+        * string(value) -- string value
     close_mappings:
       - sh:defaultValue
     in_subset:
@@ -1356,12 +1358,12 @@ slots:
     abstract: true
     description: Grouping for metamodel slots that constrain the a slot value to equal a specified constant
     status: testing
-    
+
   list_value_specification_constant:
     abstract: true
     description: Grouping for metamodel slots that constrain members of a multivalued slot value to equal a specified constant
     status: testing
-      
+
   value_presence:
     is_a: list_value_specification_constant
     domain: slot_definition
@@ -1379,7 +1381,7 @@ slots:
     description: the slot must have range string and the value of the slot must equal the specified value
     in_subset:
       - SpecificationSubset
-        
+
   equals_number:
     is_a: list_value_specification_constant
     range: integer  ## todo, make the range a union
@@ -1438,7 +1440,7 @@ slots:
     status: testing
     in_subset:
       - SpecificationSubset
-    
+
   has_member:
     is_a: list_value_specification_constant
     range: anonymous_slot_expression
@@ -1545,7 +1547,7 @@ slots:
       - should only be used with multivalued slots
     in_subset:
       - SpecificationSubset
-        
+
   list_elements_unique:
     domain: slot_definition
     range: boolean
@@ -1568,7 +1570,7 @@ slots:
       If True, then the relationship between the slot domain and range is many to one or many to many
     in_subset:
       - SpecificationSubset
-      
+
   key:
     domain: slot_definition
     range: boolean
@@ -1705,7 +1707,7 @@ slots:
       - owl:SymmetricProperty
     in_subset:
       - SpecificationSubset
-    
+
   asymmetric:
     is_a: relational_logical_characteristic
     description: If s is antisymmetric, and i.s=v where i is different from v, v.s cannot have value i
@@ -1761,7 +1763,7 @@ slots:
     description: transitive_form_of including the reflexive case
     in_subset:
       - SpecificationSubset
-        
+
   inverse:
     domain: slot_definition
     range: slot_definition
@@ -2055,7 +2057,7 @@ slots:
   # -----------------------------------
   # Slots for import expressions
   # -----------------------------------
-      
+
   import_from:
     domain: import_expression
     required: true
@@ -2129,7 +2131,7 @@ slots:
     description: a rule for inferring a slot assignment based on evaluating a path through a sequence of slot assignemnts
     domain: slot_definition
     range: path_expression
-      
+
   # -----------------------------------
   # Relational Roles
   # -----------------------------------
@@ -2148,7 +2150,7 @@ slots:
       - in the context of Entity-Relationship (ER) modeling, this is used to state that a class models a relationship between entities, and should be drawn with a diamond
       - in the context of RDF, this should be used when instances of the class are `rdf:Statement`s
       - in the context of property graphs, this should be used when a class is used to represent an edge that connects nodes
-      
+
   relational_role:
     aliases:
       - reification_role
@@ -2162,7 +2164,7 @@ slots:
       - in the context of RDF, this should be used for slots that can be modeled using the RDF reification vocabulary
       - in the context of property graphs, this should be used on edge classes to indicate which slots represent the input and output nodes
 
-      
+
 #==================================
 # Classes                         #
 #==================================
@@ -2270,7 +2272,7 @@ classes:
       - RelationalModelProfile
       - ObjectOrientedProfile
       - OwlProfile
-      
+
   type_expression:
     is_a: expression
     mixin: true
@@ -2301,7 +2303,7 @@ classes:
   anonymous_type_expression:
     mixins:
       - type_expression
-      
+
   type_definition:
     rank: 4
     mixins:
@@ -2372,7 +2374,7 @@ classes:
     description: An enum_expression that is not named
     mixins:
       - enum_expression
-        
+
   enum_definition:
     rank: 5
     aliases:
@@ -2405,7 +2407,7 @@ classes:
       - source_ontology
     in_subset:
       - SpecificationSubset
-      
+
   reachability_query:
     description: A query that is used on an enum expression to dynamically obtain a set of permissible values via walking from a set of source nodes to a set of descendants or ancestors over a set of relationship types
     slots:
@@ -2417,7 +2419,7 @@ classes:
       - traverse_up
     in_subset:
       - SpecificationSubset
-      
+
   structured_alias:
     description: >-
       object that contains meta data about a synonym or alias including where it came from (source)
@@ -2483,7 +2485,7 @@ classes:
         range: path_expression
       all_of:
         range: path_expression
-    
+
   slot_expression:
     description: an expression that constrains the range of values a slot can take
     mixin: true
@@ -2531,7 +2533,7 @@ classes:
     mixins:
       - slot_expression
     status: testing
-    
+
   slot_definition:
     rank: 3
     description: an element that describes how instances are related to other instances
@@ -2690,7 +2692,7 @@ classes:
     abstract: true
     description: A rule that is applied to classes
     status: testing
-    
+
   class_rule:
     is_a: class_level_rule
     aliases:
@@ -2725,7 +2727,7 @@ classes:
       - syntax
       - interpolated
       - partial_match
-      
+
   import_expression:
     description: an expression describing an import
     status: testing
@@ -2737,7 +2739,7 @@ classes:
       - import_from
       - import_as
       - import_map
-      
+
   setting:
     description: assignment of a key to a value
     slots: