# DVD-R DL

> derivative of the DVD-R format standard

**Wikidata**: [Q2706666](https://www.wikidata.org/wiki/Q2706666)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/DVD-R_DL)  
**Source**: https://4ort.xyz/entity/dvd-r-dl

## Summary
DVD-R DL (Dual Layer) is a derivative of the DVD-R format standard and a specific subclass of DVD recordable media. It is designed to allow end users to write data to a Digital Versatile Disc, utilizing two recordable layers to effectively double the storage capacity compared to standard single-layer discs.

## Key Facts
- **Definition:** DVD-R DL is a derivative of the DVD-R format standard.
- **Classification:** It is a subclass of **DVD recordable** (any type of Digital Versatile Disc writable by end users) and **machine-readable medium**.
- **Aliases:** DVD-DL, DVD-R9, DVD-9, DVD9, DVD-R Dual Layer, Dual layer DVD-R, Dual-layer DVD-R, DVD Doble Capa, DVD-R Dual-Layer.
- **Core Function:** Like other DVD recordable formats, it is writable by end users using a compatible DVD recorder.
- **Technology:** It employs two dye layers (dual-layer technology) to increase storage capacity.
- **Capacity:** It doubles the storage capacity of standard single-layer DVD recordable discs.
- **Parent Format:** It inherits properties from the broader DVD optical-disc family.
- **Identifiers:**
    - **Freebase ID:** `/m/07p86w`
    - **Wikipedia Title:** *DVD-R DL*
- **Language Support:** Wikipedia entries exist in 10 languages: Czech (cs), German (de), English (en), Spanish (es), Finnish (fi), Indonesian (id), Italian (it), Polish (pl), Russian (ru), and Swedish (sv).
- **Sitelink Count:** 10.

## FAQs
### Q: What is DVD-R DL?
A: DVD-R DL is a dual-layer version of the standard DVD-R format. It is a subclass of DVD recordable media that allows end users to write data to a disc with double the capacity of a single-layer disc.

### Q: How does DVD-R DL relate to other DVD formats?
A: DVD-R DL is a specific derivative of the DVD-R standard and falls under the broader "DVD recordable" class, which encompasses all writable DVD technologies (such as DVD-RW and DVD+R). It is also classified as a machine-readable medium.

### Q: What are the alternative names for DVD-R DL?
A: It is also known by several aliases including DVD-DL, DVD-R9, DVD-9, DVD9, DVD-R Dual Layer, Dual layer DVD-R, Dual-layer DVD-R, DVD Doble Capa, and DVD-R Dual-Layer.

### Q: Is DVD-R DL a widely recognized standard?
A: Yes, it is documented across multiple language platforms on Wikipedia, including English, Spanish, German, and Russian, reflecting its global recognition.

## Why It Matters
DVD-R DL is significant because it solved a critical storage limitation of early optical media. By offering dual-layer technology, it allowed users to store significantly more data on a single disc—doubling the capacity—without moving to entirely new physical formats. This capability was essential for backing up larger files, authoring high-quality video content, and archiving data at a time when digital storage needs were growing beyond the limits of single-layer CDs and DVDs. As a derivative of the DVD-R standard, it extended the life and utility of the DVD recordable ecosystem for both personal and professional use.

## Notable For
- **Dual-Layer Capacity:** Distinguishes itself from standard DVD-R by using two recordable dye layers to double storage space.
- **Broad Nomenclature:** Known by a wide variety of aliases including DVD-9, DVD-R9, and DVD Doble Capa.
- **Global Documentation:** Has a strong presence on global knowledge platforms, with articles in 10 different languages.
- **Direct Lineage:** Is a direct derivative of the DVD-R format standard, maintaining compatibility within the DVD recordable family.

## Body

### Definition and Lineage
DVD-R DL is a specific format within the optical disc landscape, classified primarily as a derivative of the **DVD-R format standard**. Structurally, it sits as a subclass under **DVD recordable**, a broad category that includes any Digital Versatile Disc writable by end users (such as DVD-R, DVD-RW, and DVD+R). Additionally, it inherits properties from the **machine-readable medium** class, meaning it is designed to be read by standard DVD players and drives.

### Technical Characteristics
The primary technical feature of DVD-R DL is its dual-layer structure. Unlike standard single-layer discs, DVD-R DL employs **two dye layers** on a single side of the disc. This architecture allows the laser to focus on and record data to two distinct layers, effectively **doubling the storage capacity** while retaining the physical form factor of a standard DVD. This makes it a crucial tool for applications requiring more space than a standard DVD-R can provide, such as high-quality video authoring or large data archives.

### Nomenclature and Aliases
The format is referred to by numerous names across different contexts and regions. Common aliases include:
- **DVD-DL**
- **DVD-R9**
- **DVD-9**
- **DVD9**
- **DVD-R Dual Layer**
- **Dual layer DVD-R**
- **Dual-layer DVD-R**
- **DVD Doble Capa** (Spanish)
- **DVD-R Dual-Layer**

### Data and Identifiers
DVD-R DL is indexed and identified through several major knowledge systems:
- **Freebase ID:** `/m/07p86w`
- **Wikipedia Title:** *DVD-R DL*
- **Sitelinks:** The entity has 10 sitelinks, indicating its presence across various Wikimedia projects.
- **Language Availability:** Wikipedia articles for DVD-R DL are available in Czech (cs), German (de), English (en), Spanish (es), Finnish (fi), Indonesian (id), Italian (it), Polish (pl), Russian (ru), and Swedish (sv).

### Relationship to Parent Formats
As a subclass of **DVD recordable**, DVD-R DL shares the core functionality of allowing end users to write data. While the parent category includes both write-once (e.g., DVD-R) and rewritable (e.g., DVD-RW) technologies, DVD-R DL specifically enhances the write-once DVD-R standard by adding a second layer. It exists alongside other dual-layer variants like DVD+R DL as part of the broader evolution of the DVD recordable family, which was developed to offer flexible and high-capacity storage solutions for consumer and professional markets.

## References

1. Freebase Data Dumps. 2013