Update DENV Nextclade datasets with 2026 lineage definitions

data/community/v-gen-lab/dengue/denv1/CHANGELOG.md

@@ -1,3 +1,13 @@
+## Unreleased
+
+- 2026 Annual update: added new lineages to the classification system as determined by the scientific committee.
+- Updated representative tree sequences to reduce assignment errors.
+- Outgroup sequences are now labeled `unassigned` instead of `Outgroup`.
+- Restored country coloring and the map using Pathoplexus country metadata where available.
+- Most reference-tree tips now use Pathoplexus accessions (`PP_...`) as their identifiers.
+- Corrected placement masks to match each serotype's GFF3 coding bounds and reference length.
+- New lineages: 1V_A.1, 1V_A.2, 1V_D.1.4, 1V_F.1, 1V_F.2
+
 ## 2026-04-14T11:55:23Z
 
 - Move `placementMaskRanges` to tree.json

data/community/v-gen-lab/dengue/denv1/README.md

@@ -10,7 +10,7 @@
 
 ## Scope of This Dataset
 
-This dataset is based on the dengue virus lineage system from [Hill V, Cleemput S, Pereira JS, et al., 2024](https://doi.org/10.1371/journal.pbio.3002834) and is suitable for the analysis of DENV-1 viral sequences. The systems are independent, so sequences from other serotypes may not be classified or may be assigned as "Outgroup."
+This dataset is based on the dengue virus lineage system from [Hill V, Cleemput S, Pereira JS, et al., 2024](https://doi.org/10.1371/journal.pbio.3002834) and is suitable for the analysis of DENV-1 viral sequences. The systems are independent, so sequences from other serotypes may be reported as `unassigned`.
 
 ## Dengue Lineages System Project
 
@@ -32,4 +32,8 @@ For bugs, please open an [issue](https://github.com/V-GEN-Lab/dengue-lineages-wo
 
 ² University of São Paulo [(USP)](https://www5.usp.br/english/institutional/).
 
-Read more about Nextclade datasets in the Nextclade documentation: [Nextclade Datasets](https://docs.nextstrain.org/projects/nextclade/en/stable/user/datasets.html).
+Read more about Nextclade datasets in the Nextclade documentation: [Nextclade Datasets](https://docs.nextstrain.org/projects/nextclade/en/stable/user/datasets.html).
+
+<!-- workflow:data-use:start -->
+This dataset includes sequences obtained from [Pathoplexus](https://pathoplexus.org/), some of which are subject to Restricted-Use terms. Use and redistribution of these sequences must comply with the [Pathoplexus Data Use Terms](https://pathoplexus.org/about/terms-of-use/data-use-terms), including the applicable requirements for publications and preprints.
+<!-- workflow:data-use:end -->