General wording
IA : Information Architecture, the navigation and flow of the website.
P4 : The short version name of our WordPress theme; Planet 4.
AJAX : AJAX (Asynchronous JavaScript And XML) is the use of the XMLHttpRequest object to communicate with servers.
Back-end : The dashboard, where you make all your edits to the website.
Front-end : The actual website, how visitors see them.
Taxonomy : A fancy word for the classification/grouping of things.
UI : User Interface. Any and all technology you interact with as a user. (Screens, sounds, overall style, …)
Page types
Different types of content that are used for different purposes. Organized in their own sections in the P4 backend. (WordPress technically calls these Post Types but, erm, we call something else Post Types, so…)
Editable Page Types
Posts – A Page Type that contains timely informative content (e.g. updates). Posts are related to one another by shared taxonomies (In P4’s case – Categories, Tags, and Post Types). Editors compose Posts using Blocks. Posts can be displayed on Pages using various Dynamic Blocks.
Actions – A Page Type that contains timely action-oriented content (e.g. a petition). Actions are related to one another by shared taxonomies (TBD, most likely will use Categories and Tags and possibly a new Action Taxonomy). Editors compose Actions using Blocks. Actions can be displayed on Pages using various dynamic Blocks.
Pages – A Page Type that contains evergreen content (e.g. About Us). Pages are related to one another by a hierarchy. Editors compose Pages using Blocks. Pages can be displayed on other pages using sub-menus.
Landing Pages (fka Campaign Pages) – A Page Type that is primarily used for marketing purposes, focused on conversion. Options include minimal navigation and customizable theme. Editors compose Landing Pages using Blocks. Not displayed on other pages or in navigation (but currently do show up in Search).
Semi-editable Page Types
Listing Pages – A Page Type that shows all of the content related to a Taxonomy Term. Not editable with Blocks. Has a few editable parts – title, description, and (in new proposed designs) a ‘featured action’.
Non-editable Page Types
System Pages – A Page Type that is automatically generated by the site. Not editable with Blocks. Only editable in the theme code. (e.g. Search, 404)
Taxonomy
Taxonomy is a fancy word for the classification/grouping of things. Taxonomies can be hierarchical (with parents/children) or flat.
Taxonomy Term
A single term that is part of a Taxonomy. Every Taxonomy Term has an associated Listing Page.
Categories
A default WordPress Taxonomy that is hierarchical. Used for high-level topics such as Oceans, Plastics, Climate Change (these would each be a Taxonomy Term).
Tags
A default WordPress Taxonomy that is flat. Used for more granular topics such as #ZeroWaste, #Diet, #RenewableEnergy, #Whales (these would each be a Taxonomy Term).
Post Types
A custom P4 Taxonomy that is used to categorize different (you guessed it) types of posts. Default P4 Post Types are Story, Press Release, and Publication.
Action Types
A custom P4 Taxonomy that is used to categorize different types of action. Default P4 Post Types are Story, Press Release, and Publication.
Blocks
Components for adding content to a Post, Action, Page, or Landing Page. Can be static (e.g. paragraph, image, heading), dynamic (e.g. pull in a list of Posts associated with a specific tag), or pull in content from somewhere else using embed code (e.g. Twitter timeline or Instagram post).
Block Patterns
Small predefined collections of blocks, usually used for a specific section of a page of content. Can be added to a piece of content and then edited. E.g. A cover block that contains a heading block and a subheading block. (more examples here)
Block Layouts
Large predefined collections of blocks (or block patterns), usually used for a whole page of content. Can be added to a piece of content and then edited. E.g. a Campaign Page Layout that has sections for describing the problem, the solutions, and actions a supporter can take.
Check them all on the P4 Design systems or learn more about blocks vs block patterns vs block layouts.
Components (non-editable)
User interface elements of a page that are not editable using blocks, but in some cases can be customized via a page’s settings (e.g. comments form on posts, page headers, tag buttons on posts).
Content model

This list will get updated regularly. Last update was on 20 October 2022.
Questions?
Ask them on Slack in the #p4-general community discussion.