Generate Json schema from XML schema XSD

Question

Does anybody know how to generate a JSON schema from a existing XML schema  XSD file   Are there any tools available for this

User · Answer

Copy your XML schema here  amp  get the JSON schema code to the online tools which are available to generate JSON schema from XML schema

User · Answer

Disclaimer  I am the author of Jsonix  a powerful open-source XML lt - JSON JavaScript mapping library   Today I ve released the new version of the Jsonix Schema Compiler  with the new JSON Schema generation feature   Let s take the Purchase Order schema for example  Here s a fragment      lt xsd element name  purchaseOrder  type  PurchaseOrderType   gt      lt xsd complexType name  PurchaseOrderType  gt       lt xsd sequence gt         lt xsd element name  shipTo  type  USAddress   gt         lt xsd element name  billTo  type  USAddress   gt         lt xsd element ref  comment  minOccurs  0   gt         lt xsd element name  items   type  Items   gt       lt  xsd sequence gt       lt xsd attribute name  orderDate  type  xsd date   gt     lt  xsd complexType gt    You can compile this schema using the provided command-line tool   java -jar jsonix-schema-compiler-full jar     -generateJsonSchema     -p PO     schemas purchaseorder xsd   The compiler generates Jsonix mappings as well the matching JSON Schema   Here s what the result looks like  edited for brevity           id   PurchaseOrder jsonschema         definitions             PurchaseOrderType                 type   object                title   PurchaseOrderType                properties                     shipTo                         title   shipTo                        allOf                                                            ref     definitions USAddress                                                                                      billTo                         title   billTo                        allOf                                                            ref     definitions USAddress                                                                                                           USAddress                           anyOf                           type   object                properties                     name                          ref   http   www jsonix org jsonschemas w3c 2001 XMLSchema jsonschema  definitions QName                                      value                          ref     definitions PurchaseOrderType                                                elementName                     localPart   purchaseOrder                    namespaceURI                                       Now this JSON Schema is derived from the original XML Schema  It is not exactly 1 1 transformation  but very very close   The generated JSON Schema matches the generatd Jsonix mappings  So if you use Jsonix for XML lt - JSON conversion  you should be able to validate JSON with the generated JSON Schema  It also contains all the required metadata from the originating XML Schema  like element  attribute and type names    Disclaimer  At the moment this is a new and experimental feature  There are certain known limitations and missing functionality  But I m expecting this to manifest and mature very fast   Links    Demo Purchase Order Project for NPM - just check out and npm install Documentation Current release Jsonix Schema Compiler on npmjs com

User · Answer

True  but after turning json to xml with xmlspy  you can use trang application  http   www thaiopensource com relaxng trang html  to create an xsd from xml file s

User · Answer

Disclaimer  I m the author of jgeXml   jgexml has Node js based utility xsd2json which does a transformation between an XML schema  XSD  and a JSON schema file   As with other options  it s not a 1 1 conversion  and you may need to hand-edit the output to improve the JSON schema validation  but it has been used to represent a complex XML schema inside an OpenAPI  swagger  definition   A sample of the purchaseorder xsd given in another answer is rendered as    PurchaseOrderType        type    object      properties          shipTo             ref      definitions USAddress              billTo             ref      definitions USAddress              comment             ref      definitions comment              items             ref      definitions Items              orderDate            type    string          pattern      0-9  4 - 0-9  2 - 0-9  2

User · Answer

JSON Schema is not intended to be feature equivalent with XML Schema   There are features in one but not in the other   In general you can create a mapping from XML to JSON and back again  but that is not the case for XML schema and JSON schema   That said  if you have mapped a XML file to JSON  it is quite possible to craft an JSON Schema that validates that JSON in nearly the same way that the XSD validates the XML   But it isn t a direct mapping   And it is not possible to guarantee that it will validate the JSON exactly the same as the XSD validates the XML   For this reason  and unless the two specs are made to be 100  feature compatible  migrating a validation system from XML XSD to JSON JSON Schema will require human intervention

[xml] Generate Json schema from XML schema (XSD)

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