| Package | Description | 
|---|---|
| com.fasterxml.jackson.core | Main public API classes of the core streaming JSON
 processor: most importantly  JsonFactoryused for constructing
 JSON parser (JsonParser)
 and generator
 (JsonParser)
 instances. | 
| com.fasterxml.jackson.core.base | Base classes used by concrete Parser and Generator implementations;
 contain functionality that is not specific to JSON or input
 abstraction (byte vs char). | 
| com.fasterxml.jackson.core.format | Package that contains interfaces needed for dynamic, pluggable
 format (auto)detection; as well as basic utility classes for
 simple format detection functionality. | 
| com.fasterxml.jackson.core.io | |
| com.fasterxml.jackson.core.json | JSON-specific parser and generator implementation classes that
 Jackson defines and uses. | 
| com.fasterxml.jackson.core.sym | Internal implementation classes for efficient handling of
 of symbols in JSON (field names in Objects) | 
| com.fasterxml.jackson.core.type | Contains classes needed for type introspection, mostly used by data binding
 functionality. | 
| com.fasterxml.jackson.core.util | Utility classes used by Jackson Core functionality. | 
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