FHIR JAXB XJC Code generation

Question

I am trying to generate java code from an xsd for FHIR.

I downloaded the code generation schema from here and then I ran:

xjc patient.xsd

But I've got the following exception:

parsing a schema...
[ERROR] src-resolve: Cannot resolve the name 'Account' to a(n) 'type definition' component.
  line 332 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'DetectedIssue' to a(n) 'type definition' component.
  line 354 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'ImplementationGuide' to a(n) 'type definition' component.
  line 380 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'MedicationOrder' to a(n) 'type definition' component.
  line 387 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'QuestionnaireResponse' to a(n) 'type definition' component.
  line 409 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'Parameters' to a(n) 'type definition' component.
  line 425 of file:/Users/gerard/Downloads/fhir-codegen-xsd/fhir-base.xsd

[ERROR] src-resolve: Cannot resolve the name 'MeasuredQuantity' to a(n) 'type definition' component.
  line 225 of file:/Users/gerard/Downloads/fhir-codegen-xsd/questionnaireanswers.xsd

I've imported to eclipse all the xsd and I see the same errors in fhir-base.xsd. Not sure how to solve it because for example the account.xsd is in the same directory.

It might be helpful to post the relevant xsd files here (namely patient.xsd and fhir-base.xsd) — rmlan, Apr 28 '16 at 13:27
@rmlan the files are huge, you can download it from the link 'here'. Thanks. — Gerard Ribas, Apr 28 '16 at 13:34

score 2 · Answer 1 · answered May 27 '16 at 14:39

I was having the same problem. I've tried three resources from the archive provided on the fhir website:

fhir-base.xsd
fhir-all.xsd
fhir-single.xsd

Every error seems to take the same form (73 of these entries) against fhir-base.xsd...

[ERROR] Property "Lang" is already defined. Use &lt;jaxb:property> to resolve this conflict.
  line 323 of file:/E:/fhir-spec/resources/fhir-all-xsd/fhir-xhtml.xsd

[ERROR] The following location is relevant to the above error
  line 324 of file:/E:/fhir-spec/resources/fhir-all-xsd/fhir-xhtml.xsd

Just trying some brute-force tactics.. I found and commented out a few lines in fhir-xhtml.xsd:

Lines 323, 324
<xs:attribute name="lang" type="LanguageCode"/>
<xs:attribute ref="xml:lang"/>

Line 1351
<xs:attribute name="lang" type="LanguageCode"/>

After this I was able to generate code successfully.

mkdir gen
xjc -d gen fhir-base.xsd

I couldn't find anywhere "official" eg github, etc to file an issue. I'm not exactly sure of the intent of the xhtml stuff to begin with, but I wonder if what may be happening here is a conflict between the fhir data type 'LanguageCode' and the html specification for language code?

Good luck!

score 1 · Answer 2 · answered Apr 28 '16 at 14:07

1

There's a separate schema called fhir-all.xsd. Code generators tend to be happier when everything's all in one file, so we publish this schema for that purpose.

answered Apr 28 '16 at 14:07

Lloyd McKenzie

6,345
1
13
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The error Property "Lang" is already defined .../fhir-xhtml.xsd still exists. Even when using fhir-all.xsd as it just references fhir-xhtml.xsd. Is there are known workarround – sandrozbinden Aug 23 '20 at 10:58

FHIR JAXB XJC Code generation

2 Answers2