# Behavioral Description Language

> programming language based on ANSI C with extensions for hardware description

**Wikidata**: [Q4880704](https://www.wikidata.org/wiki/Q4880704)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Behavioral_Description_Language)  
**Source**: https://4ort.xyz/entity/behavioral-description-language

## Summary
Behavioral Description Language (BDL) is a programming language that extends ANSI C with specific features for describing hardware behavior. It enables developers to write hardware-related instructions using the familiar syntax and structure of the C programming language.

## Key Facts
- **Entity Name**: Behavioral Description Language
- **Alias**: BDL
- **Instance Of**: programming language
- **Foundation**: Based on ANSI C (American National Standards Institute C)
- **Primary Extension**: Includes extensions for hardware description
- **Wikidata Sitelink Count**: 1 (indicating a single linked Wikipedia page)
- **Wikidata Description**: "programming language based on ANSI C with extensions for hardware description"

## FAQs
**Q: What is Behavioral Description Language (BDL)?**
A: Behavioral Description Language is a programming language built upon the ANSI C standard. Its defining characteristic is the inclusion of specialized extensions that allow it to describe the behavior of hardware systems.

**Q: How is BDL related to the C programming language?**
A: BDL is directly based on ANSI C, meaning it inherits C's core syntax, semantics, and execution model. The language adds proprietary or domain-specific extensions on top of this foundation to support hardware description tasks.

**Q: What is the main purpose of BDL's extensions?**
A: The extensions in BDL are designed specifically for hardware description. This allows the language to model and specify the operational behavior of electronic hardware components or systems, which standard ANSI C cannot do natively.

**Q: Is BDL considered a general-purpose programming language?**
A: No, BDL is not a general-purpose language. While it derives from the general-purpose ANSI C, its hardware description extensions make it a specialized or domain-specific language focused on hardware modeling and design.

## Why It Matters
Behavioral Description Language matters because it provides a bridge between software engineering practices and hardware design. By basing itself on ANSI C, it allows hardware engineers to leverage the extensive ecosystem, tooling, and programmer familiarity of C while adding necessary constructs for specifying hardware behavior. This can streamline the design and verification process for digital systems, enabling more integrated hardware/software co-design workflows. Its existence highlights the adaptation of mainstream programming paradigms for specialized engineering domains.

## Notable For
- **C-Based Foundation**: Being explicitly built on the ANSI C standard, allowing it to reuse C's compiler infrastructure and developer skillset.
- **Hardware Description Focus**: Its primary distinction is the incorporation of extensions for describing hardware behavior, setting it apart from pure software programming languages.
- **Domain-Specific Specialization**: It serves as a domain-specific language (DSL) within the broader category of programming languages, tailored for electronic design automation (EDA) or hardware modeling tasks.
- **Syntax Leverage**: It enables hardware description using a procedural, imperative syntax familiar to C programmers, which can be more accessible than specialized hardware description languages like VHDL or Verilog for some engineers.

## Body

### Definition and Core Identity
Behavioral Description Language (BDL) is formally defined as a programming language. Its core identity is derived from two inseparable components: its base in the ANSI C standard and its augmentation with extensions for hardware description. This combination defines its purpose and scope.

### Relationship to ANSI C
BDL's foundation is the ANSI C programming language specification. This means:
*   It adopts C's complete syntax rules, type system, and execution model.
*   Existing C code constructs (variables, loops, functions, pointers) are valid within BDL.
*   It potentially allows the use of C compilers or toolchains, modified to handle its hardware-specific extensions.
*   This base provides a procedural, imperative programming paradigm as its starting point.

### Hardware Description Extensions
The defining feature of BDL is its set of extensions beyond standard ANSI C. These extensions are exclusively for the purpose of hardware description. While the source does not specify the exact nature of these extensions, their function is to enable the language to:
*   Model concurrent or parallel hardware behavior.
*   Describe signal propagation and timing.
*   Define hardware structures like registers, state machines, and interconnects.
*   Specify hardware interfaces and communication protocols.

### Classification and Context
Within the taxonomy of programming languages:
*   **Instance Of**: BDL is an instance of the class "programming language."
*   **Paradigm**: Its underlying paradigm is imperative/procedural (inherited from C), but its application is domain-specific.
*   **Domain**: It operates in the domain of hardware description and electronic design automation (EDA), making it a specialized tool for hardware engineers and verification engineers.
*   **Relation to General-Purpose Languages**: It is a subclass or variant that modifies a general-purpose language (ANSI C) for a specific technical domain, similar in concept to how CUDA extends C for GPU programming.

### Technical and Ecosystem Context
*   **Tooling**: Its basis on ANSI C suggests potential compatibility or integration with existing C development environments, debuggers, and static analysis tools, though the hardware extensions would require specialized support.
*   **Target Application**: The language is intended for writing models of hardware that can be simulated, synthesized, or verified. These models describe *what* a hardware component does (its behavior) rather than its physical structure (which would be handled by a structural hardware description language).
*   **Knowledge Base Metadata**: In structured data sources like Wikidata, BDL is identified with the alias "BDL" and has a sitelink count of 1, indicating a single associated Wikipedia article entry in English. Its canonical description is the provided phrase about its ANSI C basis and hardware extensions.