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Editorial Team
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Asked: 2026-05-19T23:19:04+00:00

I got this from the JAXB doc for @XmlElement If required() is true, then

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I got this from the JAXB doc for @XmlElement

If required() is true, then Javabean
property is mapped to an XML schema
element declaration with
minOccurs=”1″. maxOccurs is “1” for a
single valued property and “unbounded”
for a multivalued property.

However when I say 

@XmlElement(name = "Name", required = true, nillable = false)

I get the following in the .xsd

<xs:element name="Name" type="xs:string"/>

I wonder how I can make minOccurs to equal to 1. It seems like required = true causes minOccurs to disappear

Edit
I realize that the default value is 1. Is there anyway to for minOccurs to show up as 1 in the .xsd

Edit2
I am using JAXBContext.generateSchema to generate the schema (FYI)

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1 Answer

  1. Editorial Team

    The JAXB spec defines the behaviour:

    If required() is true, then Javabean
    property is mapped to an XML schema
    element declaration with
    minOccurs=”1″. maxOccurs is “1” for a
    single valued property and “unbounded”
    for a multivalued property.

    The indivual implementations (Metro, EclipseLink MOXy, Apache JaxMe) are free to generate the XML schema as they see fit according to this rule. Metro and MOXy (I’m the tech lead) choose to use the absence of the minOccurs attribute to indicate minOccurs=”1″.

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