Mark Oberfield

Hello @henrychv, The permissableUsageReason attribute is used for non-operational test or exercise advisories. There is no requirement that products such as the TAF (or SIGMETs/AIRMETs) need this also. V/R, mark

As this is determined not to be WMO's responsibility, should this issue be closed?

From my OxygenXML application trying to access one of the files at schemas.wmo.int/iwxxm/3.0/examples folder using the https protocol:  Gory and probably not very informative details:  When I switched...

Hello Dmitry, Thank you for your kindly offered assistance, but no, I just wanted to provide more details to the problem. V/R, mark On Wed, Apr 15, 2020 at 9:58...

Are you proposing these changes for all codelists and enumerations?

Actually, @blchoy and @moryakovdv, all of the complex types listed in the [extension tutorial table](https://github.com/NOAA-MDL/GIFTs/wiki/Encoding-supplementary-information-in-IWXXM#the-iwxxm-extension-elements) allow for an [unlimited](https://github.com/wmo-im/iwxxm/blob/1772b08917c18cd4d1058b5b120755d823e5c454/IWXXM/metarSpeci.xsd#L83) number of extension elements to appear within them. However, I do...

I should add that I agree with @blchoy that a single instance should suffice for both code list and enumeration extensions as you've proposed above. It's hard for me to...

While an unlimited number of extension elements is allowed by the schemas, in reality, the Schematron rule, [Common.Report-2](https://github.com/wmo-im/iwxxm/blob/24e74231c62f142a90437ae392f94309d5bec6b7/IWXXM/rule/iwxxm.sch#L803), limits its use significantly in IWXXM documents as it was designed to...

I've been running TAC->IWXXM software on US METAR/SPECI observations in near real-time for the past year or so. Only once did the validation tool flagged a METAR message for exceeding...

I am not aware of another prolific user of extension elements comparable to the US. The situations which are likely to exceed the 5K limit are those which are of...