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[netmod] Query about must statement syntax

"Ivory, William" <william.ivory@intl.att.com> Tue, 07 January 2020 10:31 UTC

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From: "Ivory, William" <william.ivory@intl.att.com>
To: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Query about must statement syntax
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Date: Tue, 07 Jan 2020 10:31:10 +0000
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Subject: [netmod] Query about must statement syntax
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Hi,

I've got a must statement that causes a compilation error on a Cisco NCS device (admittedly ancient (NCS version 3.4.4), but can't update it), as follows:

must "(../../packets * current()) <= (../../interval * 1000)";

Error is 'error: XPath syntax error: 40: unknown operator current'

However, our internal XPATH compiler thinks this is valid, and if I change the order in the must statement to the following, the NCS is happy:

must "(current() * ../../packets) <= (../../interval * 1000)";

Can anyone confirm if there is a genuine error in the original must statement, or is it valid XPATH?

Thanks,

William

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