Implementation:Sdv dev SDV DayZSynthesizer Single Table

Knowledge Sources	Sdv_dev_SDV SDV Docs
Domains	Synthetic_Data, Parameter_Detection
Last Updated	2026-02-14 19:00 GMT

Overview

Concrete tool for detecting, creating, and validating DayZ synthesizer parameters for single-table data provided by the SDV library.

Description

The sdv.single_table.dayz module provides the DayZSynthesizer class for single-table synthetic data generation. In the open-source SDV, only the create_parameters and validate_parameters class methods are publicly available; instantiation raises a SynthesizerInputError directing users to SDV-Enterprise. The create_parameters method detects column-level statistics (missing value proportions, numerical min/max and decimal digits, datetime boundaries, categorical value sets) and table-level statistics (num_rows) from data and metadata. The validate_parameters method validates a parameters dictionary against the metadata schema, checking types, value ranges, and structural correctness.

Usage

Use DayZSynthesizer.create_parameters to automatically detect parameters from data and metadata for DayZ-based synthesis. Use DayZSynthesizer.validate_parameters to validate a parameters dictionary before passing it to SDV-Enterprise. The __init__ method is intentionally blocked in open-source SDV.

Code Reference

Source Location

• Repository: Sdv_dev_SDV
• File: sdv/single_table/dayz.py
• Lines: 1-437

Signature

class DayZSynthesizer:
    """Single-Table DayZSynthesizer for public SDV."""

    def __init__(self, metadata, locales=['en_US']):
        # Raises SynthesizerInputError (Enterprise-only)
        ...

    @classmethod
    def create_parameters(
        cls,
        data: pd.DataFrame,
        metadata: Metadata,
        filepath: str = None,
    ) -> dict:
        """Create parameters for the DayZ synthesizer."""
        ...

    @staticmethod
    def validate_parameters(
        metadata: Metadata,
        parameters: dict,
    ) -> None:
        """Validate a DayZSynthesizer parameters dictionary."""
        ...

Import

from sdv.single_table import DayZSynthesizer

I/O Contract

Inputs (create_parameters)

Name	Type	Required	Description
data	pd.DataFrame	Yes	Input data for parameter detection
metadata	Metadata	Yes	SDV Metadata describing the table schema
filepath	str	No	If provided, writes parameters as JSON to this path

Outputs (create_parameters)

Name	Type	Description
parameters	dict	DayZ parameter dict with DAYZ_SPEC_VERSION, tables, and per-column stats

Inputs (validate_parameters)

Name	Type	Required	Description
metadata	Metadata	Yes	SDV Metadata for the data
parameters	dict	Yes	DayZ parameter dictionary to validate

Usage Examples

Creating Parameters

import pandas as pd
from sdv.metadata import Metadata
from sdv.single_table import DayZSynthesizer

# Load data and metadata
data = pd.read_csv('my_table.csv')
metadata = Metadata.detect_from_dataframes({'my_table': data})

# Create DayZ parameters
params = DayZSynthesizer.create_parameters(
    data=data,
    metadata=metadata,
    filepath='dayz_params.json',
)
print(params)

Validating Parameters

from sdv.single_table import DayZSynthesizer

# Validate a parameters dictionary
DayZSynthesizer.validate_parameters(
    metadata=metadata,
    parameters=params,
)
# No error means parameters are valid

Related Pages

• Environment:Sdv_dev_SDV_Python_Runtime