ERROR: Element rule has extra content: <attribute>

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Environment

SUSE Linux Enterprise Server 15

Situation

Automated installation with an autoyast profile stops with a warning:

ERROR: Element rule has extra content: dialog

or similar.
A user might see:

Resolution

To verify if the autoyast syntax is valid, run jing command against the profile:

jing /usr/share/YaST2/schema/autoyast/rng/rules.rng rules.xml

If there is a syntax error, the command above provides information about the line containing the error.
You have two choices:

Update the profile with the correct syntax
Add YAST_SKIP_XML_VALIDATION=1 boot parameter to skip the profile validation

Cause

With SLES15 AutoYaST now validates the profile at runtime, reporting issues to the user.

Disclaimer

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