Please explain XPATH "Require XML element in XSD when another element has certain value?"

[mariomueller]

Hi all,

on https://stackoverflow.com/questions/370 ... tain-value
I found an example for
"Require XML element in XSD when another element has certain value?"

In the solution is the XPATH:

Code: Select all

<xs:assert test="not(TYPE = 'INTERNATIONAL') or IBAN"/>

Could anybody please explain this? Why gets IBAN mandatory when TYPE = 'INTERNATIONAL'?
Many thanks
Regards
Mario

[mariomueller]

Hi,

i got it. OR is logical OR. Means: At least one expression must be true
When TYPE = 'INTERNATIONAL' the left side is false. So the right side 'IBAN' must be true.

<xs:assert test="not(TYPE = 'INTERNATIONAL') or IBAN"/>

Regards Mario

[tavy]

Hello,

Yes, the assert condition is satisfied even if the type is not 'INTERNATIONAL', or if the type is 'INTERNATIONAL' and you have an 'IBAN' element.

Best Regards,
Octavian