https://github.com/s-celles/tokenorientedobjectnotation.jl
Token-Oriented Object Notation (TOON) encoder/decoder for Julia
https://github.com/s-celles/tokenorientedobjectnotation.jl
aigenerated decoder deserialization encoder json julia-language serialization work-in-progress
Last synced: 7 months ago
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Token-Oriented Object Notation (TOON) encoder/decoder for Julia
- Host: GitHub
- URL: https://github.com/s-celles/tokenorientedobjectnotation.jl
- Owner: s-celles
- License: mit
- Created: 2025-11-16T15:26:44.000Z (8 months ago)
- Default Branch: main
- Last Pushed: 2025-11-18T19:27:13.000Z (7 months ago)
- Last Synced: 2025-11-18T21:08:30.669Z (7 months ago)
- Topics: aigenerated, decoder, deserialization, encoder, json, julia-language, serialization, work-in-progress
- Language: Julia
- Homepage: https://s-celles.github.io/TokenOrientedObjectNotation.jl/dev/
- Size: 668 KB
- Stars: 2
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# TokenOrientedObjectNotation.jl
[](https://github.com/s-celles/TokenOrientedObjectNotation.jl/actions/workflows/CI.yml)
[](https://github.com/s-celles/TokenOrientedObjectNotation.jl/actions/workflows/Documentation.yml)
[](https://codecov.io/gh/s-celles/TokenOrientedObjectNotation.jl)
[](https://github.com/JuliaTesting/Aqua.jl)
[](https://github.com/toon-format/spec/blob/main/SPEC.md)
[](./COMPLIANCE_VALIDATION_REPORT.md)
[](./test/COMPLIANCE_TEST_COVERAGE.md)
[](./LICENSE)
Julia implementation of **Token-Oriented Object Notation (TOON)**, a compact, human-readable serialization format optimized for LLM contexts.
## What is TOON?
TOON is a line-oriented, indentation-based text format that encodes the JSON data model with explicit structure and minimal quoting. It achieves 30-60% token reduction compared to JSON while maintaining readability and deterministic structure.
**Key Features:**
- Compact representation of tabular data
- Minimal quoting requirements
- Explicit array lengths for validation
- Support for multiple delimiter types (comma, tab, pipe)
- Strict mode for validation
- 100% compatible with JSON data model
## Installation
```julia
using Pkg
Pkg.add(url="https://github.com/s-celles/TokenOrientedObjectNotation.jl")
```
Or in the Julia REPL package mode:
```julia-repl
pkg> add https://github.com/s-celles/TokenOrientedObjectNotation.jl
```
## Quick Start
### Encoding
```julia
using TokenOrientedObjectNotation
# Simple object
data = Dict("name" => "Alice", "age" => 30)
toon_str = TokenOrientedObjectNotation.encode(data)
println(toon_str)
# name: Alice
# age: 30
# Array of objects (tabular format)
users = [
Dict("id" => 1, "name" => "Alice", "role" => "admin"),
Dict("id" => 2, "name" => "Bob", "role" => "user")
]
toon_str = TokenOrientedObjectNotation.encode(Dict("users" => users))
println(toon_str)
# users[2]{id,name,role}:
# 1,Alice,admin
# 2,Bob,user
```
### Decoding
```julia
using TokenOrientedObjectNotation
# Decode a simple object
input = "name: Alice\nage: 30"
data = TokenOrientedObjectNotation.decode(input)
# Dict("name" => "Alice", "age" => 30)
# Decode an array
input = "[3]: 1,2,3"
data = TokenOrientedObjectNotation.decode(input)
# [1, 2, 3]
```
### Options
```julia
using TokenOrientedObjectNotation
# Encoding with custom options
options = TokenOrientedObjectNotation.EncodeOptions(
indent = 4, # Use 4 spaces per indentation level
delimiter = TokenOrientedObjectNotation.TAB, # Use tab as delimiter
keyFolding = "safe", # Enable key folding
flattenDepth = 2 # Limit folding depth
)
data = Dict("user" => Dict("name" => "Alice"))
toon_str = TokenOrientedObjectNotation.encode(data, options=options)
# Decoding with custom options
options = TokenOrientedObjectNotation.DecodeOptions(
indent = 4, # Expect 4 spaces per level
strict = true, # Enable strict validation
expandPaths = "safe" # Enable path expansion
)
data = TokenOrientedObjectNotation.decode(toon_str, options=options)
```
## Examples
### JSON vs TOON Comparison
**JSON:**
```json
{
"users": [
{ "id": 1, "name": "Alice", "role": "admin" },
{ "id": 2, "name": "Bob", "role": "user" }
],
"count": 2
}
```
**TOON:**
```
users[2]{id,name,role}:
1,Alice,admin
2,Bob,user
count: 2
```
Token savings: ~45% reduction
### Complex Nested Structures
```julia
using TokenOrientedObjectNotation
data = Dict(
"server" => Dict(
"host" => "localhost",
"port" => 8080,
"tags" => ["web", "api"]
),
"database" => Dict(
"type" => "postgresql",
"connections" => 10
)
)
println(TokenOrientedObjectNotation.encode(data))
# server:
# host: localhost
# port: 8080
# tags[2]: web,api
# database:
# type: postgresql
# connections: 10
```
### Key Folding (Compact Nested Objects)
```julia
using TokenOrientedObjectNotation
# Deep nesting with key folding
data = Dict("api" => Dict("v1" => Dict("users" => Dict("endpoint" => "/api/v1/users"))))
# Without key folding (default)
println(TokenOrientedObjectNotation.encode(data))
# api:
# v1:
# users:
# endpoint: /api/v1/users
# With key folding
options = TokenOrientedObjectNotation.EncodeOptions(keyFolding="safe")
println(TokenOrientedObjectNotation.encode(data, options=options))
# api.v1.users.endpoint: /api/v1/users
```
### Path Expansion (Round-trip with Key Folding)
```julia
using TokenOrientedObjectNotation
# Decode with path expansion
input = "api.v1.users.endpoint: /api/v1/users"
options = TokenOrientedObjectNotation.DecodeOptions(expandPaths="safe")
data = TokenOrientedObjectNotation.decode(input, options=options)
# Dict("api" => Dict("v1" => Dict("users" => Dict("endpoint" => "/api/v1/users"))))
# Round-trip: folding + expansion
encode_opts = TokenOrientedObjectNotation.EncodeOptions(keyFolding="safe")
decode_opts = TokenOrientedObjectNotation.DecodeOptions(expandPaths="safe")
original = Dict("a" => Dict("b" => Dict("c" => 42)))
encoded = TokenOrientedObjectNotation.encode(original, options=encode_opts) # "a.b.c: 42"
decoded = TokenOrientedObjectNotation.decode(encoded, options=decode_opts) # Reconstructs original structure
```
### Different Delimiters
```julia
using TokenOrientedObjectNotation
users = [
Dict("name" => "Alice", "role" => "admin"),
Dict("name" => "Bob", "role" => "user")
]
# Comma delimiter (default)
println(TokenOrientedObjectNotation.encode(Dict("users" => users)))
# users[2]{name,role}:
# Alice,admin
# Bob,user
# Tab delimiter
options = TokenOrientedObjectNotation.EncodeOptions(delimiter=TokenOrientedObjectNotation.TAB)
println(TokenOrientedObjectNotation.encode(Dict("users" => users), options=options))
# users[2 ]{name role}:
# Alice admin
# Bob user
# Pipe delimiter
options = TokenOrientedObjectNotation.EncodeOptions(delimiter=TokenOrientedObjectNotation.PIPE)
println(TokenOrientedObjectNotation.encode(Dict("users" => users), options=options))
# users[2|]{name|role}:
# Alice|admin
# Bob|user
```
### Strict Mode Validation
```julia
using TokenOrientedObjectNotation
# Strict mode catches errors (default)
input = "[3]: 1,2" # Declares 3 items but only has 2
try
TokenOrientedObjectNotation.decode(input) # strict=true by default
catch e
println(e) # "Array length mismatch: expected 3, got 2"
end
# Non-strict mode is lenient
options = TokenOrientedObjectNotation.DecodeOptions(strict=false)
result = TokenOrientedObjectNotation.decode(input, options=options) # [1, 2] - accepts actual count
```
## API Reference
### Main Functions
#### `encode(value; options::EncodeOptions=EncodeOptions()) -> String`
Encode a Julia value to TOON format string.
**Arguments:**
- `value`: Any Julia value (will be normalized to JSON model)
- `options`: Optional encoding configuration
**Returns:** TOON formatted string
#### `decode(input::String; options::DecodeOptions=DecodeOptions()) -> JsonValue`
Decode a TOON format string to a Julia value.
**Arguments:**
- `input`: TOON formatted string
- `options`: Optional decoding configuration
**Returns:** Parsed Julia value (Dict, Array, or primitive)
### Types
#### `EncodeOptions`
Configuration for encoding:
- `indent::Int = 2`: Number of spaces per indentation level
- `delimiter::Delimiter = ","`: Delimiter for arrays (`,`, `\t`, or `|`)
- `keyFolding::String = "off"`: Key folding mode (`"off"` or `"safe"`)
- `flattenDepth::Int = typemax(Int)`: Maximum folding depth
#### `DecodeOptions`
Configuration for decoding:
- `indent::Int = 2`: Expected spaces per indentation level
- `strict::Bool = true`: Enable strict validation
- `expandPaths::String = "off"`: Path expansion mode (`"off"` or `"safe"`)
## Specification Compliance
**✅ FULLY COMPLIANT with TOON Specification v2.0**
This implementation has been validated against all normative requirements in the official [TOON Specification v2.0](https://github.com/toon-format/spec/blob/main/SPEC.md) with **1750 passing tests**.
### Core Features
- ✅ All primitive types (string, number, boolean, null)
- ✅ Canonical number formatting (no exponents, no trailing zeros)
- ✅ Objects with nested structures
- ✅ Primitive arrays (inline format)
- ✅ Tabular arrays (uniform objects with all delimiters)
- ✅ Mixed/complex arrays (expanded list format)
- ✅ Objects as list items with proper depth handling
- ✅ Root form detection (array, primitive, object)
### String Handling
- ✅ Five valid escape sequences (\\, \", \n, \r, \t)
- ✅ Complete quoting rules (empty, whitespace, reserved literals, numeric-like, special chars)
- ✅ Delimiter-aware quoting (document vs active delimiter)
### Delimiters and Formatting
- ✅ Multiple delimiters (comma, tab, pipe)
- ✅ Proper delimiter scoping (document vs active)
- ✅ Array header syntax with delimiter symbols
- ✅ Consistent indentation and whitespace rules
### Validation and Options
- ✅ Strict mode validation (all §14 error conditions)
- ✅ Array count and row width validation
- ✅ Indentation validation (multiples, no tabs)
- ✅ Configurable encoding/decoding options
### Advanced Features (v2.0)
- ✅ Key folding (safe mode with depth limits)
- ✅ Path expansion (safe mode with conflict detection)
- ✅ Round-trip compatibility between folding and expansion
### Known Limitations
- Number precision limited to Float64 (~15-17 decimal digits)
- Very deeply nested structures (100+ levels) may impact performance
- Julia Dict preserves insertion order (implementation detail, not guaranteed by language spec)
## Testing
Run the comprehensive test suite (1750 tests):
```julia
using Pkg
Pkg.test("TOON")
```
### Test Coverage
The test suite includes:
- **Requirements Testing:** All 15 normative requirements (900+ tests)
- **Round-trip Testing:** Encode/decode preservation (69 tests)
- **Determinism Testing:** Consistent output validation (24 tests)
- **Edge Cases:** Empty values, deep nesting, large arrays (75 tests)
- **Spec Examples:** All examples from the specification (79 tests)
- **Error Conditions:** All §14 error scenarios (57 tests)
- **Integration Tests:** Real-world usage patterns (546 tests)
See [COMPLIANCE_VALIDATION_REPORT.md](./COMPLIANCE_VALIDATION_REPORT.md) for detailed validation results.
## Performance
TOON achieves significant token reduction compared to JSON:
- **Tabular data:** 40-60% reduction
- **Nested objects:** 20-40% reduction
- **Mixed structures:** 30-50% reduction
Example token counts (using GPT-4 tokenizer):
```julia
# JSON: 156 tokens
# TOON: 89 tokens (43% reduction)
users = [
Dict("id" => 1, "name" => "Alice", "email" => "alice@example.com", "active" => true),
Dict("id" => 2, "name" => "Bob", "email" => "bob@example.com", "active" => false)
]
```
## Documentation
Comprehensive documentation is available in the `docs/` folder:
- **Getting Started** - Installation and basic usage
- **User Guide** - Detailed encoding and decoding guide
- **Examples** - Real-world usage examples
- **API Reference** - Complete API documentation
- **Compliance** - Specification compliance details
### Building Documentation
```bash
julia --project=docs -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
julia --project=docs docs/make.jl
```
Then open `docs/build/index.html` in your browser.
## Contributing
Contributions are welcome! See [CONTRIBUTING.md](docs/src/contributing.md) for guidelines.
### Development
```julia
# Clone the repository
git clone https://github.com/s-celles/TokenOrientedObjectNotation.jl.git
cd TokenOrientedObjectNotation.jl
# Run tests
julia --project=. -e 'using Pkg; Pkg.test()'
# Run specific test file
julia --project=. test/test_encoder.jl
```
## License
[MIT](./LICENSE) License © 2025 TOON Format Organization
## Related Projects
- [Official TOON Specification](https://github.com/toon-format/spec)
- [TypeScript/JavaScript Implementation](https://github.com/toon-format/toon)
- [Python Implementation](https://github.com/toon-format/toon-python)
## Links
- **Specification:** [SPEC.md](https://github.com/toon-format/spec/blob/main/SPEC.md)
- **Test Fixtures:** [Spec test suite](https://github.com/toon-format/spec/tree/main/tests/fixtures)
- **Benchmarks:** [Token efficiency results](https://github.com/toon-format/toon/tree/main/benchmarks)