Add support for xsd:union

[karina-klinkeviciute]

XSD files can have memberTypes which are unions of two or more types. In this case, we need to find which of those types is most generic and use it for matching the DSA type.

Examples

• https://ws.registrucentras.lt/broker/info.php?t=718&f=out
• https://ws.registrucentras.lt/broker/info.php?t=770&f=out

Depends on

• Add source.type column ivpk/dsa#11

Related

• Add default() function ivpk/dsa#10

[sirex]

Adding few examples here, since web links have a tendency of becoming broken links.

<xs:simpleType>
  <xs:union memberTypes="label_point empty-string"/>
</xs:simpleType>
<xs:simpleType name="label_point">
  <xs:restriction base="xs:decimal">
    <xs:totalDigits value="10"/>
    <xs:fractionDigits value="2"/>
  </xs:restriction>
</xs:simpleType>
<xs:simpleType name="empty-string">
  <xs:restriction base="xs:string">
    <xs:enumeration value=""/>
  </xs:restriction>
</xs:simpleType>

I thing union element can also include simpleType definitions or reference types with memberTypes attribute.

DSA does not support polymorphic types, so I thing, we have a two options:

1. Check all member types in the union and pick most generic type, which in most cases will be string. But also, add original type to source.type (see #dsa:11).
2. List all possible types as separate properties, adding type name as property name suffix. Also add source.type.

Also, we could add a resolution for a specific case. For example as in the example above, we could detect, that this is a number tipe, which is not required. Since XML does not have NULL type, so empty string for decimal could be interpreted as NULL?

[karina-klinkeviciute]

implemented in the new version of XSD

[Struchid]

implemented in the new version of XSD

@karina-klinkeviciute so can this be closed then?

[karina-klinkeviciute]

implemented in the new version of XSD

@karina-klinkeviciute so can this be closed then?

taip, uždarysiu šį issue