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django-icv-tree stores hierarchies as materialised paths: every node knows its full ancestry in one indexed column. Below is the real ICV capability hierarchy, not sample data: expand a category, follow the breadcrumb, list every descendant of any node.
Capability tree (root: ICV OSS)
Click a name to select it. Click the triangle to expand or collapse its children.
Ancestors of Foundation
get_ancestors(include_self=True), one query
Descendants of “Foundation”
get_descendant_count() = 3, one COUNT query
path column is a prefix-indexed string (e.g. 0001/0002/0001). Ancestors and descendants are WHERE path LIKE prefix lookups, not recursive CTEs or nested-set left/right rebalancing on every write.
Both links below are built the same way, a plain url template tag with no host handling. hostmap decides, per call, whether the result stays relative or becomes absolute.
Host-based URL routing and host-aware reversing.
Materialised path tree structures.
Cross-domain taxonomy, vocabularies, and tagging.
Pluggable search engine integration.
Scalable sitemap and discovery file generation.
A brand-agnostic UI substrate: shell, nav, components.