BL Choy

Addition of new WMO Abbreviated Headings for exchange of VONA reports over ICAO AFS

8

### Initial request In the proposed Amendment 81 to ICAO Annex 3, Volcano Observatory Notice for Aviation (VONA) information will need to be exchanged over the ICAO Aeronautical Fixed Service...

Cannot get schema from https://schemas.wmo.int/iwxxm/3.0/iwxxm.xsd

9

This was raised in PR #215. It was noticed that oXygenXML Editor can only successfully get the schema when it was configured to ignore invalid certificate (see https://github.com/wmo-im/iwxxm/pull/215#issuecomment-612056692). However, I...

Making schematron rules validate multiple version of IWXXM

14

This is a follow up to #162, in particular on the [identified actions](https://github.com/wmo-im/iwxxm/issues/162#issuecomment-533787113). After some tests, it is proposed to: 1. Remove COLLECT.MB1 from iwxxm.sch, as we want it to...

Common, Measures and other cross-package features Readiness

16

Referencing #245. We (Jan and Choy) propose the following implementation of extension for code list and enumeration classes: ### Code list class: [Post proposal note: Multiplicity of extension has changed...

Rules for creating namespace URI and namespace prefix

5

This issue intends to continue and extend the discussion in #214 and the excellent [write up on IWXXM extension](https://github.com/NOAA-MDL/GIFTs/wiki/Encoding-supplementary-information-in-IWXXM) @mgoberfield has created. While XML namespace is supposed to be local...

Documentation of iwxxm:WAFSJetStreamWindSymbol/iwxxm:windSpeed has left out the possible use of knot as unit of measure

2

**Describe the bug** Documentation of iwxxm:WAFSJetStreamWindSymbol/iwxxm:windSpeed has left out the possible use of knots as unit of measure. **To Reproduce** N/A. **Expected behavior** Current it said _'Horizontal wind speed at...

IWXXM 2025-2RC1 Comment 1 - QVA concentration category

7

Larry Burch [email protected] to tt-avdata, Karen Dear members of the WMO Task Team on Aviation Data I have concerns with the threshold descriptors in the QVA schema (shown below), as...

Sigmet and Volcanic Ash Advisories - filling volcano element.

5

### Discussed in https://github.com/wmo-im/iwxxm/discussions/337 Originally posted by **Mattonius5** September 24, 2024 Hello, This affects All IWXXM versions, concerning VAA/Sigmet element "volcano/erupting volcano", especially "metce:eruptionDate", Given the VAA example below: ```html...

IWXXM 2025-2RC1 Comment 2 - Additional sections in QVA

2

大野 頼二 [email protected] Tue, Oct 15, 2024, 5:00 PM to Anna, [email protected], Choy, Karen, Paula, Marco, Tim, Peter, 西條, 大河原, 藤本, 速水 Dear Anna of WMO and TT-AvData team, Sorry...

Left over editorial changes to be made in metarSpeci.xsd

1

We missed the changes to the documentation in metarSpeci.xsd in 2025-2RC2: ``` RVR conditions are required if horizontal visibility or RVR is less than 1500 meters, up to a maximum...