Define require fields based on other field value in XSD

Question

I have a requirement where I am trying to define require fields (minOccurs=1) based on other field value in XSD but not able to do so.

I am trying to give simple example to understand my problem a bit more. Please refer below two simple xml where state is the field which defines what event occured. I need to define processingTime and processResult as required fields in XSD file if state field value is PROCESS_END because there is no need of these fields when process starts. This is just simple example to illustrate my problem. Thanks in advance.

<?xml version = "1.0"?>
<metadata>
    <title>The processing started event</title>
    <state>PROCESS_START</state>
</metadata>

<?xml version = "1.0"?>
<metadata>
    <title>The processing ended event</title>
    <state>PROCESS_END</state>
    <processingTime>100s</processingTime>
    <processResult>success</processResult>
</metadata>

You will first need to ensure your parser supports XSD 1.1 to do that. Then, have a look at https://stackoverflow.com/questions/27878402/how-to-make-type-depend-on-attribute-value-using-conditional-type-assignment, which is closely related to your issue here? — potame, Apr 24 '20 at 06:50

score 1 · Accepted Answer · answered Apr 24 '20 at 08:29

In XSD 1.1, define processingTime and processResult as optional elements, and on the complexType for metadata, define <xs:assert test="if (state='PROCESS_END') then exists(processingTime) and exists(processResult) else true()"/>.

It can't be done in XSD 1.0. Many of the commonly used XSD validators, e.g. the one from Microsoft, have never been upgraded to XSD 1.1.

Define require fields based on other field value in XSD

1 Answers1