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enumDefs: defines ordered list of values for defining the valid values of an attribute.  The example on the left defines an enum called file_action that has 8 values (numbered 0-7) with values of NONE, EXECUTE, WRITE, WRITE_EXECUTE, READ, READ_EXECUTE, READ_WRITE, ALL.  The enum can be used as a type in other definitions:

{

"name":

"group",

"typeName":

"file_action",

"cardinality":

"SINGLE",

"isIndexable":

true,

"isOptional":

false,

"isUnique":

false

},

{

"name":

"file_action",

"typeVersion":

"1.0",

"elementDefs":

[

{

"ordinal":

0,

"value":

"NONE"

},

{

"ordinal":

1,

"value":

"EXECUTE"

},

{

"ordinal":

2,

"value":

"WRITE"

},

{

"ordinal":

3,

"value":

"WRITE_EXECUTE"

},

{

"ordinal":

4,

"value":

"READ"

},

{

"ordinal":

5,

"value":

"READ_EXECUTE"

},

{

"ordinal":

6,

"value":

"READ_WRITE"

},

{

"ordinal":

7,

"value":

"ALL"

}

]

}

structDefs: defines a complex structure that can be used as an attribute type in other definitions.   In the example to the right, a struct called hive_order is defined which has 2 attributes: order (an integer) and col (a string).  The struct can be used as a type in other definitions: for example:

{

"name":

"sortCols",

"typeName":

"array<hive_order>",

"cardinality":

"SINGLE",

"isIndexable":

false,

"isOptional":

true,

"isUnique":

false

},

   Structs are stored as their own vertex in the graph, linked to their entity.

{

"name":

"hive_order",

"typeVersion":

"1.0",

"attributeDefs":

[

{

"name":

"order",

"typeName":

"int",

"cardinality":

"SINGLE",

"isIndexable":

false,

"isOptional":

false,

"isUnique":

false

},

{

"name":

"col",

"typeName":

"string",

"cardinality":

"SINGLE",

"isIndexable":

false,

"isOptional":

false,

"isUnique":

false

}

]

},

classificationDefs: defines a classification that can be assigned to a metadata entity and then used for governance.

entityDefs: defines the structure for a top-level metadata entity.  In the example on the right, there is an entity definition for a process.  It is a subtype of Referenceable and Asset and adds attributes called inputs (an array of entities called DataSet) and outputs (another array of type DataSet).

      {

            "name": "Process",

            "superTypes": ["Referenceable",

                           "Asset"],

            "typeVersion": "1.0",

            "attributeDefs": [

                {

                    "name": "inputs",

                    "typeName": "array<DataSet>",

                    "cardinality": "SINGLE",

                    "isIndexable": false,

                    "isOptional": true,

                    "isUnique": false

                },

                {

                    "name": "outputs",

                    "typeName": "array<DataSet>",

                    "cardinality": "SINGLE",

                    "isIndexable": false,

                    "isOptional": true,

                    "isUnique": false

                }

            ]

        }