1. Register Field, Tenor, Mode
The three features of the context of situation

2. Register Variation
a variety “according to use” (Halliday 1985:43), the variety of language used in particular texts (e.g. technical texts, legal texts, and so on) or in particular circumstances (at work, between friends, etc.) distinguished by choice of vocabulary or style.

3. Register is determined by three components of the context of situation:
Field
Tenor
Mode
Field, Tenor and Mode serve to interpret the social context of a text.

4. Field:
The clause as a representation
the kind of activity. What semantic features of the text can we explain by reference to features of the situation?
(e.g. What is happening, when and where, what the participants know, why they are doing what they are doing) .

5. The clause as a representation Field of discourse (what is going on)
Processes:
Material processes: processes of “doing and happening”: do, make, create, write, compose, build, produce, construct, etc.
Mental processes: Processes of ‘sensing’: think, believe, suppose, decide, expect, consider, imagine, dream, perceive, etc.
Relational processes: “processes of being and having”: exist, be, having, become, remain, grow, appear, seem, etc.
Verbal processes: tell, say, talk, quote, report, speak, announce, etc.

6. The clause as a representation Field of discourse (what is going on)
circumstances of time , place, manner, (adverbials of time, place, manner)
Naming: nouns, Noun Phrases.

7. -Field:
In what social setting is this kind of text typically produced? [circumstantial elements]
What is the text about? [different kind of processes, naming]
What is its communicative purpose? (it’s genre) [processes, naming: economic, social, law, newspaper report]

8. --Tenor: Clause as exchange
the personal relationship involved: the social relationships existing between participants in terms of power and status (manager and clerk; how they feel about each other; whether they know each other well; the role of the participants (questioner/answerer, informer/require)
(e.g. Who are taking part? Language varies according to who is speaking or writing to whom, and what roles and status these people have in the communicative act and in the situational and cultural context; .

9. -Tenor (who is taking part)
Clause as exchange
the clause is also a proposition, a proposal, where by we inform, or question, give an order, make an offer, or express our appraisal of, and attitude towards whoever we are addressing and what we are talking about.

10. -Tenor (who is taking part)
Clause as exchange
Interpersonal function (mood, modality, personal pronouns
speech acts (proposal, inform, question, give an order, etc.)

11. -Tenor:
Clause as exchange
How is the power relationship between the writer and the reader signalled? [personal pronouns, inclusive or exclusive we, mood, modality].
What is the role structure that is played by the writer and the reader? [imformer/questioner; leader/public, etc.]

12. -Mode:
Clause as message: how the sequences of discourse are built?
what part the language is playing? deliver a speech; the organization of a text, whether it is written (faxed, ed) or spoken (recorded, on the phone, etc.); the medium employed: written to be spoken (political speeches) or spoken to be written (e.g. dictated letters); whether a text is performative (carrying out an action), descriptive, or reflective, spontaneous or well-thought. Theme-Rheme structure

13. -Mode:
How is the language being used?
How is the text organized as a series of larger units of meaning (Reason»Results [cause » Reults]; General»Particular; problem » solution)
Is the text performative or constative, spontaneus or well thought?

14. SITUATION realised by TEXT-
SITUATION realised by TEXT
Feature of the context Functional component of the semantic system
Field of discourse (what is going on) realised by what?....
Tenor of discourse (who are taking part) realised by what?....
Mode of discourse (role assigned to language) realised by what?....

15. SITUATION realised by TEXT -
Feature of the context Functional component of the semantic system
Field of discourse (what is going on) Experiential function (transitivity in verbal processes, naming, time, place, etc.)
Tenor of discourse (who are taking part) Interpersonal function (mood, modality, personal pronouns , speech acts, etc.)
Mode of discourse (role assigned to language) Textual function. (Thematic structure, information structure, coesive exoforic, endoforic references, Grammar complexity, terminological density, conjunctives , etc.) -

16. SITUATION realised by TEXT -
Feature of the context Functional component of the semantic system
Field of discourse (what is going on)
Processes:
Material processes: processes of “doing and happening”: do, make, create, write, compose, build, produce, construct, etc.
Mental processes: Processes of ‘sensing’: think, believe, suppose, decide, expect, consider, imagine, dream, perceive, etc.
Relational processes: “processes of being and having”: exist, be, having, become, remain, grow, appear, seem, etc. -