DatapacksJava
Compound Key Reader
Java data pack listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Read the keys of nbt compounds easily
Command Format
function compound_key_reader:get {data:{from/value:...},result:'<ResultFunction>'}
- Result: Save the compound as a list in
storage compound_key_reader:result keys - Like
key+value+seqformat:
- Like
[ { "value": "(value)", "key": "(key)", "seq": "(seq)" }, ... ]
UPGRADING
- If you want to upgrade from
<=Beta2.0to>=Beta2.1,follow theUPGRADE.1.md
Result Functions
- The functions will beed called by the reader function to get the format of the result.
- You can use it just like
foreach(<ResultFunction>)in the following format - You CANNOT use
compound_key_reader:getin the result function!
- You CANNOT use
| Type | Value | Description |
|---|---|---|
| Arguments | c |
Count |
| Arguments | l,r |
Substr cur |
| Arguments | key |
The name of the key |
| ReturnValue | 0|VOID |
No Result |
| ReturnValue | +1 |
Save substr cur((l,r]) in xx.cur |
| ReturnValue | +2 |
Save key name in xx.key |
| ReturnValue | +4 |
Save key value in xx.value |
| ReturnValue | +8 |
Save the sequence in the keys in xx.seq |
| Presets | compound_key_reader:result_preset/key |
key+seq |
| Presets | compound_key_reader:result_preset/key-value |
key+value+seq |
| Presets | compound_key_reader:result_preset/all |
(all) |
- Substr curs:Use
string storage compound_key_reader:result str $(l) $(r)to get the key
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
File checked by MCModsHub
- Downloads as Compound Key Reader 1.20.6-(65) Beta2.2 2024-12-18.zip
- Download size: 244 KB
- Download link checked 7 Nov 2026 — working
These come from our own check of the pack file, not from the source page.