Glossary

Definitions of terms used in the curriculum.

Showing 281–320 of 902 terms in the glossary

Letter C1 term

CX33

  • Server Types
A Hetzner server type that offers 4 virtual CPUs, 8 GB RAM and an 80 GB disk.

Letter D39 terms

daemon

  • Concepts
The background service (Docker Engine) that manages containers and responds to Docker commands.

Dashboard

  • General
  • Interface
The web page where you manage your Deepgram account, keys and settings.

Also known as: dashboard

1 other definition

dashboard · Interface

A web interface served on port 3000 where you manage Dokploy projects, apps and settings.

Data Analysis

  • Features
A built-in ChatGPT capability that lets you upload spreadsheets or data files and ask questions about the data, create charts, or run calculations — no coding required.

data classification

  • Core
Sorting data into levels such as open, internal and restricted, each with rules on where it may go. It tells you at a glance whether a document may go into a given AI tool.

Also known as: data classes, data class

data controller

  • Roles
The person or organization that decides why and how personal data is processed.

Data mapping

  • Concepts
The act of telling a node where to find its input by dragging a field from a previous node's output onto the current node's input — no code required.

data minimisation

  • Core
Sharing or storing only the data a task really needs. With AI tools, that means removing names and details the model doesn't need before you paste or upload anything.

Also known as: data minimization

Data Port

  • Concepts
A port that passes a data table between nodes; shown as a black triangle and can only connect to another data port.

Data Processing Agreement (DPA)

  • Documents
  • Core
A contract between your organisation and a service provider that handles personal data on its behalf. It sets what the provider may do with the data, and the GDPR requires one before you use such a service with personal data.

Also known as: data processing agreement, DPA, data-protection agreement, Auftragsverarbeitungsvertrag

1 other definition

Data Processing Agreement (DPA) · Documents

A legal contract that spells out how a vendor will handle personal data on behalf of the organization that owns it.

data protection impact assessment

  • Core
A written risk check that the GDPR requires before processing that is likely to put people at high risk, for example new technology applied to health data. It describes the processing, the risks and the measures against them.

Also known as: DPIA

data protection officer

  • Core
The person in an organisation who advises on data protection and checks that the GDPR is followed. Ask them before you use a new AI tool with personal data.

Also known as: DPO

data residency

  • Core
Where your data is physically stored and processed. An EU data residency option keeps it in European data centres, which makes GDPR compliance easier.

Also known as: EU data residency, European data residency, data location

data retention

  • Core
How long a service keeps your prompts, files and outputs before deleting them. Check the retention period in the provider's terms, and whether you can shorten it.

Also known as: retention period

database

  • Core
An organised store of data that programs can search and update quickly, such as customer records or experiment results. Most databases are queried with SQL.

Also known as: databases

DataFrame

  • Concepts
A table of data provided by the pandas library — it has named columns and numbered rows, similar to a spreadsheet you can manipulate with code.

dedicated endpoint

  • Features
A private, reserved slice of Cerebras infrastructure for your organisation alone, offering guaranteed throughput and advanced features like fine-tuning, custom model weights, and the Priority service tier.

Deep Agent

  • Features
An advanced AI mode that can search the web, write code and design slides all from one instruction.

Deep Research

  • Concepts
  • Features
A ChatGPT tool that autonomously searches the web, reads multiple sources, and compiles a long-form referenced report on a topic you specify.

Also known as: deep research

3 other definitions

Deep Research · Features

A Gemini feature that automatically searches many sources, spends roughly 5–10 minutes analyzing them, and produces a detailed written report on any topic you ask about.

deep research · Concepts

An Onyx mode where an agent plans a multi-step investigation across your sources and the web, then writes a structured, cited brief — for questions too broad for a single answer.

Deep Research · Features

An autonomous research mode that spends several minutes performing dozens of searches across hundreds of sources and produces a structured, multi-section report — equivalent to asking a research analyst to investigate a topic for you.

Deep Research Mode

  • Prompting
A toggle that tells Perplexity to produce an in‑depth, multi‑section report with tables and citations automatically.

Deep Think

  • Features
An advanced reasoning mode exclusive to Google AI Ultra subscribers where Gemini takes extra time to reason through complex or difficult problems before responding.

deepfake

  • Core
An image, video or voice recording made or changed by AI so that it looks or sounds like a real person or event. Under the EU AI Act, deepfakes must be labelled as AI-generated.

Also known as: deepfakes

def

  • Concepts
A Python keyword that marks the start of a new function definition — everything indented beneath it is the code that runs when you call that function.

default

  • Concepts
The standard permission mode where only read operations run without prompting; file edits and shell commands always ask for your approval.

defendability check

  • Process
A quick test to see if you can explain why a prompt works after it fails once; if not, the prompt relies on guesswork.

delimiter

  • Prompt Elements
A character or string added to the prompt to clearly separate parts of the input, helping the model understand the structure.

deliverable

  • Concepts
The finished output Cowork returns — a report, spreadsheet, or deck — not just a chat reply.

dependencies

  • Dependencies
  • Core
A package or program that another piece of software needs in order to run. Installing an app often pulls in many dependencies automatically.

Also known as: dependency

1 other definition

dependencies · Dependencies

External code packages required by the plugin, listed so they can be installed automatically.

Deployment

  • Concepts
Publishing your v0 project to Vercel so it runs at a public URL with automatic HTTPS and global CDN distribution.

description

  • Files & config
The one-line summary in a skill's frontmatter that tells the agent WHEN to use the skill — the single most important line to get right.

Design a Voice

  • Features
A tool that blends two or more existing voices and lets you adjust speed, pitch, and emotion to create a new custom voice.

Design Mode

  • Features
A visual editing tool in v0 that lets you click any element in the live preview and adjust its appearance using a style panel or natural-language instructions, without writing code directly.

diff

  • Commands
  • Concepts
  • Core
A view of exactly what changed between two versions of a file: the lines removed and the lines added. Read the diff before you accept changes an AI tool made.

Also known as: Diff

3 other definitions

diff · Concepts

The view Cursor shows of what the AI changed in a file; you review it and choose to accept or reject before it is saved.

diff · Commands

A display of line‑by‑line changes between two versions of a file, often shown by the git diff command.

Diff · Concepts

A side-by-side file change comparison showing exactly which lines were added or removed by Lovable.

distillation

  • How models are built
Training a smaller model to imitate a bigger one, keeping much of the quality at a fraction of the size.

DMG

  • Files
A macOS disk image file that you double‑click to install an application.

DNS

  • Concepts
System that maps a readable domain name to your server’s IP address for easier access.

Docker

  • Tools
  • Core
The most common tool for building and running containers. Many self-hosted apps are installed with Docker, so you don't have to set up their dependencies by hand.
1 other definition

Docker · Tools

Software that runs applications inside isolated containers, used by Dokploy to host your services.

docker --version

  • Commands
A command that prints the installed Docker client version number.

docker compose up

  • Commands
The command that brings up a self-hosted Onyx stack (web app, indexes, workers, storage) from its official compose file on your own machine or server.