Glossary

Definitions of terms used in the curriculum.

Showing 841–880 of 902 terms in the glossary

Letter T6 terms

Trigger

  • Workflows
  • Core
The event that starts a workflow, such as a new email, a set time or an incoming web request.

Also known as: triggers

1 other definition

Trigger · Workflows

The event that starts a Zap — a new email, a new spreadsheet row, a form submission.

trigger node

  • Components
  • Concepts
The first node in a workflow that starts the process when something happens, like receiving a new email.

Also known as: Trigger node

1 other definition

Trigger node · Concepts

A special node that sits at the start of a workflow and decides when it runs — for example, on a schedule, when a form is submitted, or when another app sends a signal.

trust boundary

  • Change control
The point where authority changes. An automated system may propose or perform explicitly permitted work, while a named human retains consequential decisions.

Also known as: trust boundaries

TUI

  • Concepts
Text user interface — a richer, full-screen terminal app (menus and panels, still keyboard-driven).
1 other definition

TUI · Concepts

Terminal User Interface — the interactive chat screen you see when you launch opencode in your terminal, where you type messages and watch the AI respond.

two-factor authentication

  • Core
Signing in with a second proof besides your password, such as a code from an app on your phone. It stops most account takeovers after a password leaks.

Also known as: 2FA, multi-factor authentication, MFA

TypeError

  • Concepts
A Python error that fires when an operation is applied to the wrong kind of value — for example, trying to do arithmetic on a piece of text instead of a number.

Letter U12 terms

U1‑U4

  • Buttons
Buttons that upscale (increase resolution of) the first through fourth thumbnail in the result grid.

Ubuntu app

  • Interface
The shortcut in the Start menu that launches the Ubuntu Linux distribution inside WSL2.

UFW

  • Commands
Simple firewall tool; the command ufw allow 3000/tcp opens network traffic on port 3000 for the app.

Unlisted

  • Features
A sharing setting where anyone with the link can view your project, but it will not be indexed by search engines or appear in public galleries.

untrusted

  • Concepts
An approval policy that lets Codex run commands it recognises as safe automatically but stops and asks you before running anything outside its trusted set.

Upload

  • Actions
Process of sending a local file (e.g., PDF, MP3) to the Open Notebook server so it becomes part of a notebook.

upscale

  • Features
A tool that increases the resolution of an image or video to make it look sharper.

Upsert

  • Features
The action in Flowise that sends your prepared document chunks into a Vector Store — it adds new entries and updates existing ones without creating duplicates.

usermod

  • Commands
A command that modifies a user account, such as adding the user to a new group.

utils.py

  • Files & config
A Python file named by convention to hold small helper functions shared across multiple scripts in the same project, keeping the main files shorter and easier to read.

utterance_ms

  • General
A setting that tells Deepgram how many milliseconds of silence must follow speech before it treats the spoken part as finished.

uv

  • Commands
A fast Python package and project manager (made by Astral) that works like pip but runs significantly faster, especially when installing many packages at once.

Letter V21 terms

V1‑V4

  • Buttons
Buttons that generate four new variations based on the selected thumbnail.

ValueError

  • Concepts
A standard Python error raised when a function receives an argument of the right type but an unacceptable value, such as a negative number where a positive one is required.
1 other definition

ValueError · Concepts

A Python error that occurs when a function receives a value of the right type but an inappropriate content — for example, passing an empty list where data is required.

Variable

  • Concepts
A named placeholder in a Dify prompt or workflow that gets filled in at run-time — either from user input or from the output of an earlier node.

variation

  • Features
An alternative version of the generated image that you can choose from after the AI finishes.

vector database

  • Concepts
  • Core
A database that stores embeddings and quickly finds the ones closest to a question. It is the search engine behind most "chat with your documents" tools.

Also known as: vector DB

1 other definition

vector database · Concepts

A storage system that keeps document meanings as numeric vectors so the AI can quickly find similar content.

vector embedding

  • Concepts
A high‑dimensional numeric representation of text used to compare similarity between pieces of conversation.

Vector Store

  • Concepts
A specialised database that stores text as lists of numbers (vectors) so that semantically similar content can be found quickly, even if the exact words differ.

Vercel

  • Concepts
The cloud hosting platform that v0 is built on; it handles deploying your app, managing your domain, and distributing it globally — and your v0 account is a Vercel account.

version control

  • Core
A system that records every change to a set of files over time, so you can compare versions, undo mistakes and combine work from several people.

Also known as: version control system, VCS

Versions

  • Features
A saved snapshot of your project's code created each time v0 updates a code block in response to a message; you can review, compare, or restore any earlier version.

vertical video (9:16)

  • File Types
A video format taller than it is wide, common for phone screens like Instagram Stories.

Video Agent

  • Tools
A tool that builds a video from a text description by selecting scenes, avatars, voices and styles before rendering.

virtual environment

  • Setup
An isolated Python setup that keeps the packages you install separate from other projects on your computer.

Visible tasks

  • Features
The step-by-step progress shown in the chat during a build, displaying the current step, files being modified, and tools being used.

vLLM

  • Tools
A fast engine for serving large language models locally or in the cloud.

Voice & Dictation

  • Interface
A microphone icon that records spoken questions and can read answers aloud for hands‑free interaction.

Voice Library

  • Features
A list inside ElevenLabs where you can browse, preview, and save pre‑made AI voices for later use.

Voice Mode

  • Features
A conversational interface that lets you speak your questions aloud and hear Perplexity's answers spoken back, using a real-time speech model.

Voice Studio Flow

  • Tools
A visual workflow in Twilio where you can add steps like calling Cartesia to produce spoken replies.

voice_id

  • Parameters
The name of a specific speaker model that the pipeline uses to generate speech.

VRAM

  • Running locally
The memory on your graphics card — the main limit on which local models you can run (rough rule: the model's size in GB must fit in VRAM).

Letter W1 term

WAV

  • File Types
Uncompressed audio file format that works like MP3 for uploading and transcription.