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95% Automated Conversion

COBOL Copybook to JSON Schema Migration

Modernize legacy COBOL data structures to JSON schemas with 95% automation. Complete conversion in 1-2 weeks with zero data loss and full API compatibility.

Why Modernize COBOL Copybooks?

95% Faster

Complete in 1-2 weeks vs 3-6 months manual conversion

85% Cost Savings

Eliminate expensive COBOL expertise and manual conversion

100% Accuracy

Zero data loss with automated validation and testing

4-Phase Automated Conversion

1

Copybook Analysis (2-4 hours)

AI analyzes COBOL copybooks to understand data structures, field definitions, and relationships.

  • Parse COBOL copybook syntax (PICTURE clauses, REDEFINES, OCCURS)
  • Extract field definitions, data types, and lengths
  • Identify hierarchical structures and nested records
  • Detect COMP-3 packed decimals and binary fields
2

Schema Generation (1-2 hours)

Automatically generate JSON schemas with proper data types, validation rules, and documentation.

  • Convert COBOL data types to JSON Schema types
  • Generate validation rules (min/max, patterns, enums)
  • Create nested object structures from hierarchies
  • Add descriptions and examples from COBOL comments
3

Data Conversion (3-7 days)

Convert actual COBOL data files to JSON format with validation and error handling.

  • Parse fixed-width COBOL records to JSON objects
  • Handle COMP-3 packed decimal conversion
  • Convert EBCDIC to UTF-8 encoding
  • Validate against generated JSON schemas
4

API Generation (2-3 days)

Generate REST APIs and documentation for accessing converted data.

  • Create OpenAPI/Swagger specifications
  • Generate REST endpoints for CRUD operations
  • Add authentication and authorization
  • Create interactive API documentation

COBOL to JSON Data Type Mapping

COBOL TypeExampleJSON Schema TypeValidation
PIC 9(n)PIC 9(5)integerminimum: 0, maximum: 99999
PIC S9(n)PIC S9(5)integerminimum: -99999, maximum: 99999
PIC 9(n)V9(m)PIC 9(5)V99numbermultipleOf: 0.01, maximum: 99999.99
PIC X(n)PIC X(50)stringmaxLength: 50
PIC A(n)PIC A(30)stringpattern: ^[A-Za-z ]+$, maxLength: 30
COMP-3PIC S9(7)V99 COMP-3numberPacked decimal conversion
OCCURS n TIMESOCCURS 12 TIMESarrayminItems: 12, maxItems: 12
Group Item01 CUSTOMER-RECORDobjectNested properties

AI vs Manual Conversion

FactorManual ConversionAI-Powered
Timeline3-6 months1-2 weeks
Cost$150K-$300K$20K-$40K
Accuracy85-90% (human error)100% (validated)
COBOL ExpertiseRequired (scarce/expensive)Not required
DocumentationManual creationAuto-generated
API GenerationSeparate projectIncluded
TestingManual test casesAutomated validation

People Also Ask

Can you convert COBOL copybooks without COBOL expertise?

Yes. AI-powered conversion eliminates the need for COBOL expertise. The system automatically parses COBOL syntax, understands data structures, and generates JSON schemas. This is critical because COBOL developers are increasingly scarce and expensive, with average rates of $150-200/hour.

How do you handle COMP-3 packed decimal fields?

AI automatically detects COMP-3 fields in copybooks and converts them to standard decimal numbers in JSON. The conversion handles sign nibbles, packed BCD format, and precision correctly. All conversions are validated to ensure accuracy matches the original COBOL data.

What happens to REDEFINES clauses in COBOL?

REDEFINES clauses create union types in JSON Schema using oneOf or anyOf. The AI analyzes how REDEFINES are used in your COBOL programs to determine the correct JSON representation. For example, a REDEFINES that represents different record types becomes a discriminated union with a type field.

Can you generate APIs from COBOL copybooks?

Yes. After converting copybooks to JSON schemas, the system automatically generates REST APIs with OpenAPI specifications. This includes CRUD endpoints, request/response validation, authentication, and interactive documentation. APIs are production-ready with proper error handling and logging.

How long does COBOL to JSON conversion take?

Complete conversion takes 1-2 weeks including copybook analysis, schema generation, data conversion, and API creation. This is 95% faster than manual conversion which typically takes 3-6 months. The timeline includes full testing and validation to ensure 100% accuracy.

Ready to Modernize Your Legacy COBOL Data?

Convert COBOL copybooks to JSON schemas in 1-2 weeks with 95% automation and zero data loss.