Messages can inform, request action, make a commitment, express a feeling, coordinate plans, maintain a relationship, or offer support. These categories are useful ways to understand what a message is doing—not fixed labels: one message may serve several purposes, and its meaning depends on the relationship, situation, and medium.
What message categories describe
A category is a lens for examining communication. Some frameworks classify a whole text by its broad type; others focus on the action performed by a sentence or the function of a text message. They answer different questions, so there is no single universal list of message categories.
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For example, “I’ll call you after work” conveys information and commits the sender to an action. “Are you free at six?” asks for information while potentially coordinating a plan. Identifying a primary function can help, but forcing every message into one exclusive box can obscure what else it does.
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Common purposes of messages
Informing
An informational message shares facts, updates, or an answer: “The meeting starts at 2 p.m.” Its main aim is usually to help the recipient understand something.
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Requesting or directing
A request or directive invites the recipient to do something: “Could you send me the file?” The wording may be a question, but its practical purpose is to ask for action.
Committing
A commitment states that the sender intends to act later: “I’ll send the notes tonight.” Promises and offers are common examples.
Expressing a feeling or stance
An expressive message communicates the sender’s attitude, emotion, or evaluation: “I’m sorry,” “That’s wonderful,” or “I’m not sure this will work.” It may also convey information or prompt a response.
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Maintaining contact
Some messages primarily sustain social connection rather than transfer new facts. Greetings, brief check-ins, and goodbyes can acknowledge a relationship and keep a conversation open.
Coordinating plans
Messages about times, locations, availability, and next steps help people arrange an activity. A coordination message may combine practical information with a request or relationship-building language.
Offering support
Support can take several forms: showing care, reassuring someone, helping them feel connected, giving advice or information, or providing practical assistance. A message can also be unsupportive; the support framework is useful when the question is how people help one another, not when classifying every kind of communication.
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How major frameworks classify messages
These approaches are complementary rather than rival universal taxonomies. Choose one according to whether you want to classify a whole text, a conversational unit, an utterance’s action, or a supportive function.
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| Framework | What it classifies | Useful for | Important limit |
|---|---|---|---|
| Broad text types | Whole texts, often as imaginative, informative, or persuasive | School and writing contexts | The Australian Curriculum glossary says these categories are “neither static nor watertight”; a text may fit more than one. Australian Curriculum glossary, Version 8.4. |
| Conversational discourse types | Coherent stretches of conversation and their communicative goals | Analyzing what conversational passages accomplish | A 2021 study analyzed 2.3 million words of British National Corpus 2014 conversational interactions and identified 16 discourse types associated with nine general purposes. These are findings from that corpus, not a universal distribution. Biber, Egbert, Keller, and Wizner, 2021. |
| Speech acts | What an utterance does | Distinguishing statements, requests, promises, expressions, and authorized declarations | One message can perform multiple acts, and context can affect how it is understood. SMS study discussing Searle’s taxonomy. |
| Supportive-message categories | The kind of support a message provides | Studying help within relationships | These labels address support, not the full range of message purposes. Study of text-based messages in concerned-significant-other relationships. |
| Text-message function categories | Practical, informational, and relational functions in texting | Examining how text messages combine logistics and social connection | In Crispin Thurlow’s 2003 sample, two thirds of 544 messages were coded as explicitly relational in orientation, while informational messaging accounted for as little as 15% of message codings. These sample-specific figures are not rates for texting today. Thurlow, 2003. |
Speech acts: the action inside an utterance
Speech-act analysis focuses on what a speaker accomplishes by saying something. One widely used taxonomy groups acts into five types:
- Assertives: statements that present or commit the speaker to a proposition, such as “The train is delayed.”
- Directives: attempts to get someone to act, such as “Please call me.”
- Commissives: commitments by the speaker to future action, such as “I’ll help you move.”
- Expressives: expressions of a psychological state, such as “I’m grateful” or “I’m sorry.”
- Declaratives: utterances that bring about a change when spoken by someone with the authority to do so, such as formally appointing someone to a role.
These labels describe function rather than length or format: a short text can make a promise, issue a request, or express an apology. A study applying Searle’s taxonomy to SMS notes the difficulty of treating each message as belonging to only one category; the surrounding exchange can shape interpretation.
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Why greetings and small talk still count
Phatic communication is language or nonverbal behavior used for a social purpose, such as greeting someone, opening a conversation, or saying goodbye, rather than primarily conveying information. The British Council uses “How’s it going?” as an example and notes that “What’s up?” may be intended as a greeting rather than a request for a literal account. British Council, “Phatic communication”.
A brief greeting may carry little new factual content while still signaling friendliness, attention, or willingness to talk. Whether a message is phatic depends on how it is used in context, not simply on its wording.
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How to identify a message’s primary function
Use these questions as a practical reading method, not a diagnostic test of the sender’s hidden intent:
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- What is the sender trying to do? Consider whether the message informs, requests action, commits, expresses a feeling, coordinates, maintains contact, or supports someone.
- What response does it invite? The recipient may be expected to understand, act, acknowledge, reassure, or continue the conversation.
- What do the relationship and situation change? A short request from a colleague, a family member, or an institution can carry different implications.
- How does the medium matter here? Email and SMS can support planning and coordination, but a study of digital communication describes findings from its particular setting rather than establishing a universal rule about either medium. Study of planning and coordination in digital communication.
- Could the message have more than one function? Record a primary function and, if useful, a secondary one rather than forcing a single label.
- Which framework are you using? A broad text-type label, a speech-act category, a conversational discourse type, and a support category classify different things.
When categories overlap
Consider “Hey, are you still coming to dinner? I can pick you up at 6.” The greeting helps maintain contact; the question seeks an answer and checks on plans; the offer commits the sender to practical help. The message can therefore be relational, coordinative, and commissive at once.
Overlapping labels are not a flaw. They make the analysis more faithful to communication, where people often accomplish several things in one message. Categories describe the function a message appears to serve; they do not establish what the sender privately intended.
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