Using RegEx in JSON Schema - regex

Question

Trying to write a JSON schema that uses RegEx to validate a value of an item.
Have an item named progBinaryName whose value should adhrere to this RegEx string "^[A-Za-z0-9 -_]+_Prog\\.(exe|EXE)$".
Can not find any tutorials or examples that actually explain the use of RegEx in a JSON schema.
Any help/info would be GREATLY appreciated!
Thanks,
D
JSON SCHEMA
{
"name": "string",
"properties": {
"progName": {
"type": "string",
"description": "Program Name",
"required": true
},
"ID": {
"type": "string",
"description": "Identifier",
"required": true
},
"progVer": {
"type": "string",
"description": "Version number",
"required": true
},
"progBinaryName": {
"type": "string",
"description": "Actual name of binary",
"patternProperties": {
"progBinaryName": "^[A-Za-z0-9 -_]+_Prog\\.(exe|EXE)$"
},
"required": true
}
}
}
ERRORS:
Warning! Better check your JSON.
Instance is not a required type - http://json-schema.org/draft-03/hyper-schema#
Schema is valid JSON, but not a valid schema.
Validation results: failure
[ {
"level" : "warning",
"schema" : {
"loadingURI" : "#",
"pointer" : ""
},
"domain" : "syntax",
"message" : "unknown keyword(s) found; ignored",
"ignored" : [ "name" ]
}, {
"level" : "error",
"domain" : "syntax",
"schema" : {
"loadingURI" : "#",
"pointer" : "/properties/ID"
},
"keyword" : "required",
"message" : "value has incorrect type",
"expected" : [ "array" ],
"found" : "boolean"
}, {
"level" : "error",
"domain" : "syntax",
"schema" : {
"loadingURI" : "#",
"pointer" : "/properties/progBinaryName"
},
"keyword" : "required",
"message" : "value has incorrect type",
"expected" : [ "array" ],
"found" : "boolean"
}, {
"level" : "error",
"schema" : {
"loadingURI" : "#",
"pointer" : "/properties/progBinaryName/patternProperties/progBinaryName"
},
"domain" : "syntax",
"message" : "JSON value is not a JSON Schema: not an object",
"found" : "string"
}, {
"level" : "error",
"domain" : "syntax",
"schema" : {
"loadingURI" : "#",
"pointer" : "/properties/progName"
},
"keyword" : "required",
"message" : "value has incorrect type",
"expected" : [ "array" ],
"found" : "boolean"
}, {
"level" : "error",
"domain" : "syntax",
"schema" : {
"loadingURI" : "#",
"pointer" : "/properties/progVer"
},
"keyword" : "required",
"message" : "value has incorrect type",
"expected" : [ "array" ],
"found" : "boolean"
} ]
Problem with schema#/properties/progBinaryName/patternProperties/progBinaryName : Instance is not a required type
Reported by http://json-schema.org/draft-03/hyper-schema#
Attribute "type" (["object"])

Answer 1

To test a string value (not a property name) against a RegEx, you should use the "pattern" keyword:
{
"type": "object",
"properties": {
"progBinaryName": {
"type": "string",
"pattern": "^[A-Za-z0-9 -_]+_Prog\\.(exe|EXE)$"
}
}
}
P.S. - if you want the pattern to match the key for the property (not the value), then you should use "patternProperties" (it's like "properties", but the key is a RegEx).

Answer 2

Your JSON schema syntax is incorrect. Change
"patternProperties": {
"progBinaryName": "^[A-Za-z0-9 -_]+_Prog\\.(exe|EXE)$"
}
to
"patternProperties": {
"^[A-Za-z0-9 -_]+_Prog\\.(exe|EXE)$": {}
}