Q:
Using a table, provide a step-by explanation of the journey that an email takes between sender and receiver. As part of the response, highlight the role of relevant protocols at each stage. 

A:

## Markdown Start ##
|Step|Description|Protocol / Format Involved|
|---|---|---|
|1|The user composes a post using a Fediverse-compatible client or web interface.||
|2|The user's client sends the post as an ActivityStreams object to the user's server (also called actor) using ActivityPub's client-to-server protocol.|ActivityPub (Client-to-Server), ActivityStreams|
|3|The user's server processes the post and determines the appropriate recipients based on the post's visibility.|ActivityPub (Server-to-Server)|
|4|The user's server sends the ActivityStreams object representing the post to the recipient servers using ActivityPub's server-to-server protocol.|ActivityPub (Server-to-Server), ActivityStreams|
|5|The recipient servers receive the ActivityStreams object, store the post, and update their local data store.||
|6|The recipient users access their Fediverse-compatible client or web interface to view new content.||
|7|The client or web interface retrieves the post from the recipient server using ActivityPub's client-to-server protocol and displays it to the recipient users.|ActivityPub (Client-to-Server)|
|8|The recipient users can interact with the post (e.g., like, share, reply) using the ActivityPub client-to-server and server-to-server protocols as needed.|ActivityPub (Client-to-Server, Server-to-Server)|
## Markdown End ##

Q:
Using the same approach, tabulate what happens when a post is made across the Fediverse using the ActivityPub protocol -- emphasizing ActivityPub client-server and server-server protocol aspects.

Q1: 
Are you sure that user interaction with posts includes any use of the server-server aspect of ActivityPub?

Q2: 
Is an ActivityPub server called an actor? 

Q3: 
Redo, incorporating this correction.

A:
## Markdown Start ##
|Step|Description|Protocol / Format Involved|
|---|---|---|
|1|The user composes a post using a Fediverse-compatible client or web interface.||
|2|The user's client sends the post as an ActivityStreams object to the user's server using ActivityPub's client-to-server protocol. The user is an actor in this context.|ActivityPub (Client-to-Server), ActivityStreams|
|3|The user's server processes the post and determines the appropriate recipients based on the post's visibility.|ActivityPub (Server-to-Server)|
|4|The user's server sends the ActivityStreams object representing the post to the recipient servers using ActivityPub's server-to-server protocol.|ActivityPub (Server-to-Server), ActivityStreams|
|5|The recipient servers receive the ActivityStreams object, store the post, and update their local data store.||
|6|The recipient users (actors) access their Fediverse-compatible client or web interface to view new content.||
|7|The client or web interface retrieves the post from the recipient server using ActivityPub's client-to-server protocol and displays it to the recipient users (actors).|ActivityPub (Client-to-Server)|
|8|The recipient users (actors) can interact with the post (e.g., like, share, reply) using the ActivityPub client-to-server protocol. The interactions might be propagated to other servers indirectly through server-to-server communication.|ActivityPub (Client-to-Server, Server-to-Server indirectly)|
## Markdown End ##

Q4:
Generate an RDF-based rendition the generated table about email flow along following lines :
1. Use Turtle Notation
1. Place Turtle inside `## Turtle Start ##` and `## Turtle End ##` within the code-blocks after ```turtle and before the ```
1. Denote statement subjects and objects using a hash-based hyperlink 
1. Use terms from the Schema.org vocabulary 
1. Add DBpedia cross-references where such exist

Q5:
Remember, statement subjects and objects are to be denoted using hash-based relative hyperlinks.

A:
## Turtle Start ##

@prefix schema: <http://schema.org/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix dbpedia: <http://dbpedia.org/resource/> .

<#step1> a schema:HowToStep ;
    schema:position 1 ;
    schema:text "The sender composes an email using an email client or webmail service." .

<#step2> a schema:HowToStep ;
    schema:position 2 ;
    schema:text "The sender's email client uses SMTP to submit the email to their email server (outgoing mail server)." ;
    schema:additionalType <#SMTP> .

<#step3> a schema:HowToStep ;
    schema:position 3 ;
    schema:text "The sender's email server processes the email and determines the recipient's email server." ;
    schema:additionalType <#SMTP> .

<#step4> a schema:HowToStep ;
    schema:position 4 ;
    schema:text "The sender's email server communicates with the recipient's email server to transfer the email." ;
    schema:additionalType <#SMTP> .

<#step5> a schema:HowToStep ;
    schema:position 5 ;
    schema:text "The recipient's email server receives the email and stores it in the recipient's mailbox." ;
    schema:additionalType <#SMTP> .

<#step6> a schema:HowToStep ;
    schema:position 6 ;
    schema:text "The recipient accesses their email client or webmail service to retrieve new messages." .

<#step7> a schema:HowToStep ;
    schema:position 7 ;
    schema:text "The recipient's email client uses IMAP or POP to retrieve the email from the recipient's email server." ;
    schema:additionalType <#IMAP> ;
    schema:additionalType <#POP> .

<#step8> a schema:HowToStep ;
    schema:position 8 ;
    schema:text "The recipient's email client displays the email, and the recipient can read and interact with it." .

<#SMTP> a schema:ComputerLanguage ;
    schema:name "Simple Mail Transfer Protocol" ;
    schema:alternateName "SMTP" ;
    schema:sameAs <http://dbpedia.org/resource/Simple_Mail_Transfer_Protocol> .

<#IMAP> a schema:ComputerLanguage ;
    schema:name "Internet Message Access Protocol" ;
    schema:alternateName "IMAP" ;
    schema:sameAs <http://dbpedia.org/resource/Internet_Message_Access_Protocol> .

<#POP> a schema:ComputerLanguage ;
    schema:name "Post Office Protocol" ;
    schema:alternateName "POP" ;
    schema:sameAs <http://dbpedia.org/resource/Post_Office_Protocol> .

## Turtle End ##

Q6:
Generate an RDF-based rendition the generated table about ActivityPub flow along following lines :
1. Use Turtle Notation
1. Place Turtle inside `## Turtle Start ##` and `## Turtle End ##` within the code-blocks after ```turtle and before the ```
1. Denote statement subjects and objects using a hash-based hyperlink 
1. Use terms from the Schema.org vocabulary 
1. Add DBpedia cross-references where such exist

A:
## Turtle Start ##

@prefix schema: <http://schema.org/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix dbpedia: <http://dbpedia.org/resource/> .

<#step1> a schema:HowToStep ;
    schema:position 1 ;
    schema:text "The user composes a post using a Fediverse-compatible client or web interface." .

<#step2> a schema:HowToStep ;
    schema:position 2 ;
    schema:text "The user's client sends the post as an ActivityStreams object to the user's server using ActivityPub's client-to-server protocol. The user is an 'actor' in this context." ;
    schema:additionalType <#ActivityPubClientServer> ;
    schema:additionalType <#ActivityStreams> .

<#step3> a schema:HowToStep ;
    schema:position 3 ;
    schema:text "The user's server processes the post and determines the appropriate recipients based on the post's visibility." ;
    schema:additionalType <#ActivityPubServerServer> .

<#step4> a schema:HowToStep ;
    schema:position 4 ;
    schema:text "The user's server sends the ActivityStreams object representing the post to the recipient servers using ActivityPub's server-to-server protocol." ;
    schema:additionalType <#ActivityPubServerServer> ;
    schema:additionalType <#ActivityStreams> .

<#step5> a schema:HowToStep ;
    schema:position 5 ;
    schema:text "The recipient servers receive the ActivityStreams object, store the post, and update their local data store." .

<#step6> a schema:HowToStep ;
    schema:position 6 ;
    schema:text "The recipient users (actors) access their Fediverse-compatible client or web interface to view new content." .

<#step7> a schema:HowToStep ;
    schema:position 7 ;
    schema:text "The client or web interface retrieves the post from the recipient server using ActivityPub's client-to-server protocol and displays it to the recipient users (actors)." ;
    schema:additionalType <#ActivityPubClientServer> .

<#step8> a schema:HowToStep ;
    schema:position 8 ;
    schema:text "The recipient users (actors) can interact with the post (e.g., like, share, reply) using the ActivityPub client-to-server protocol. The interactions might be propagated to other servers indirectly through server-to-server communication." ;
    schema:additionalType <#ActivityPubClientServer> ;
    schema:additionalType <#ActivityPubServerServerIndirectly> .

<#ActivityPubClientServer> a schema:ComputerLanguage ;
    schema:name "ActivityPub (Client-to-Server)" ;
    schema:sameAs <http://dbpedia.org/resource/ActivityPub> .

<#ActivityPubServerServer> a schema:ComputerLanguage ;
    schema:name "ActivityPub (Server-to-Server)" ;
    schema:sameAs <http://dbpedia.org/resource/ActivityPub> .

<#ActivityPubServerServerIndirectly> a schema:ComputerLanguage ;
    schema:name "ActivityPub (Server-to-Server, Indirectly)" ;
    schema:sameAs <http://dbpedia.org/resource/ActivityPub> .

<#ActivityStreams> a schema:ComputerLanguage ;
    schema:name "ActivityStreams" ;
    schema:sameAs <http://dbpedia.org/resource/Activity_Streams> .

## Turtle End ##