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5eccef0ff55e
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"eon_omega\": ...
9281a43f410a
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"atlas_gamma\"...
82c35e5adf59
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"alphaZephyr\"...
b28284a327cf
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"emberEmber\":...
63488487d42a
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"alphaAlpha\":...
073f5937177d
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"alphaGamma\":...
a28b4773df14
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"atlas_atlas\"...
62a281f6b1f9
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"beta_alpha\":...
11c03bb46f8d
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"velox_nova\":...
24f1ae38e111
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"zephyr_terra\...
05ffd2c03ff9
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"aurora_nova\"...
7ce55d1040d2
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"betaTerra\": ...
544f8f201d07
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"auroraGamma\"...
d03a8d5bf02b
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"lumenLumen\":...
fad4c5937ff8
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"gamma_atlas\"...
a8cc50cad2a0
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"auroraAtlas\"...
aea71c61ba69
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"ember_aurora\...
1fd780632957
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"gammaGamma\":...
1539810ec5ae
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"terraEon\": \...
ff9bca706f7d
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"lumen_nova\":...
7670bfae1002
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"velox_terra\"...
f826a94a1da5
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"omegaLumen\":...
c90bcde5050d
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"lumen_beta\":...
23ca72429556
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"nova_delta\":...
7ec669d21977
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"alphaAtlas\":...
16822f870f8f
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"beta_eon\": \...
0bf509eb78db
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"terra_gamma\"...
b95d71a9b1fb
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"aurora_ember\...
f19ce5f0192f
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"terra_omega\"...
5400655fdcdb
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"delta_ember\"...
456051d3f220
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"veloxEmber\":...
3a085a0a87db
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"deltaOmega\":...
b1524a9523de
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"novaVelox\": ...
5343eef6eed0
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"terraBeta\": ...
81e58fe08750
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"alpha_aurora\...
83b043ff619a
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"nova_terra\":...
de0fd206b6f8
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"novaZephyr\":...
00cfb3e179eb
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"terra_atlas\"...
3568720e6257
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"nova_ember\":...
ada27b17df69
C_XML
json_to_xml
transform
dummy_hard
[ { "role": "user", "content": "Convert the following JSON into well-formed XML.\nConstraints:\n- Use child elements only (no XML attributes).\n- Preserve key names and their letter case exactly.\n- Represent lists by repeating child elements in order.\nReturn ONLY XML.\n\nJSON:\n{\"items\": [{\"eonTerra\": 4...
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Hard Synthetic Dataset for Structured Data Tasks (v1)

This dataset contains 4,000 high-difficulty synthetic samples designed to improve LLM performance on complex structured data conversion, extraction, and formatting tasks.

The data is fully synthetic, generated using deterministic serialization to ensure syntax validity while maintaining high structural complexity (deep nesting and varied types).

Dataset Summary

The dataset addresses four "hard" areas typically encountered in structured data processing:

Task Subcategory Task Type Description Count
json_to_xml Transformation Nested JSON to XML without attributes, preserving case. 1,000
xml_to_yaml Transformation Deeply nested XML to YAML, preserving tag names and structure. 1,000
text_to_toml Extraction Extracting attributes from text into TOML dotted tables/AOT. 1,000
text_to_yaml Extraction Extracting attributes from text into nested YAML structures. 1,000

Data Format

Each sample is in JSONL format with the following structure:

  • id: A unique hash derived from the content.
  • category: The high-level task category (e.g., C_XML, C_TOML, C_YAML).
  • subcategory: Specific conversion/extraction type.
  • task: Action (e.g., transform, extract).
  • seed: Marker for generation source (dummy_hard).
  • messages: Conversation format (User prompt and Assistant response).

Features

  • Structural Complexity: Objects are built with random depths, including nested arrays of dictionaries and mixed scalar types.
  • Strict Validity: Every sample has been verified against standard parsers (PyYAML, tomllib/tomli, ElementTree).
  • Deterministic Serialization: Assistant responses follow strict formatting rules (e.g., 2-space indentation, specific XML tag sanitization) to serve as a reliable ground truth.

License

This dataset is licensed under CC-BY-4.0 as it is a purely synthetic collection.

Usage Note

This dataset is intended for supervised fine-tuning (SFT) of LLMs to improve their structural reasoning and formatting capabilities across various formats including XML, YAML, and TOML.

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