These data dumps have been exported from the scraper and are not designed to be changed manually.
The file namespaces.json contains a dictionary that maps catalog namespaces to URL slugs:
{
"fn": "fortnite"
}This file contains every namespace and URL slugs can be turned into complete store URLs using this format:
https://store.epicgames.com/en-US/p/{url-slug}
The directory namespaces contains a directory for every Namespace. Every directory contains a file for every catalog item in the namespace:
└─ wren
├─ 26e2fb059d1e433ba91291f6789c7136.json
├─ b2e4a9b2f8474048bc258a23307b43d1.json
├─ d8af774841684f0c8d465bcfcb24d442.json
├─ 25dcc8aa6b174704a7ebd614706b703b.json
├─ 55c6294210e5469aaa21c44fa04f96ab.json
├─ f0cacc038f734388a2983c7b7100f0f3.json
├─ babd819da5f540c59eb188a25d4beabb.json
├─ a58322b8682f4e1d9fde15fa7b354836.json
├─ 4c01dfdcdcd14595a8581217f5f0a255.json
├─ 4dfac3cf58004135a39e92877fc227ab.json
└─ ce04a7a8e3d6472194e2f128524eb730.json
It should be noted that not every catalog item is actually a game. The fn (Fortnite) namespace has over 300 catalog items, one of which is the actual game, and others are promotions, staging builds, DLCs/Addons and more. You can use the categories field to somewhat narrow down your searches. Games usually have the categories public/games/applications, while addons have public/addons/applications.