| name | asd-ste100 |
| description | Use when writing technical procedures, instructions, warnings, maintenance manuals, or any text where every reader including non-native English speakers must understand exactly one meaning. |
| compatibility | Requires standard Markdown parser and agent context |
ASD-STE100 Simplified Technical English
Control vocabulary and syntax to eliminate ambiguity in technical documentation.
The core rule
One word, one meaning. Imperative voice for instructions. Maximum 20 words per sentence.
Workflow: choose approved STE vocabulary → write imperative command → restrict sentence length to 20 words max → verify zero ambiguity.
Mechanics
- Approved vocabulary. Use only words from the ASD-STE100 dictionary or approved technical nouns.
- Imperative commands. Start steps with an action verb ("Remove the bolt", not "You should remove the bolt").
- Word count limits. Maximum 20 words for procedural sentences; maximum 25 words for descriptive sentences.
- No noun clusters. Maximum of 3 nouns in a sequence (e.g. use "valve control switch" instead of "engine fuel system valve control switch").
- Present tense. Describe current states in present tense; avoid future tense ("The light is on" not "The light will turn on").
- No gerunds in titles. Use simple nouns or infinitives for headings.
- Explicit conditions. Place conditional clauses at the beginning of the sentence ("If the pressure is low, replace the filter").
- Approved modifiers. Avoid vague adjectives like "extreme", "rapid", or "normal" unless quantified.
Verify
- Sentences do not exceed 20 words for procedures
- Every instruction starts with an active imperative verb
- No noun clusters exceeding 3 words
- All technical terms conform to standard dictionary definitions
- Zero ambiguous pronouns (replace "it" or "they" with specific nouns)
Do not
- Use words with multiple meanings (e.g., use "fast" or "secure", avoid "fixed")
- Write conditional clauses after the main action
- Use contractions or colloquialisms
- Use passive voice in maintenance steps
References
For the enforceable limits (sentence/paragraph/noun-cluster caps), safety-text structure (WARNING/CAUTION/NOTE), and punctuation rules, read references/REFERENCE.md when a draft is borderline or needs verification — load on demand, not upfront.
Example transformations
Before: "It is recommended that technicians should carefully inspect the aforementioned component assembly for any potential signs of wear prior to system operation."
After: "Inspect the component assembly for wear before you operate the system."
Before: "When the pressure drops too low, you might want to consider resetting the main system valve."
After: "If the pressure is low, reset the main valve."
