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2b5550c346
Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules. Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
28 lines
1.7 KiB
Markdown
28 lines
1.7 KiB
Markdown
---
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bc-version: [all]
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domain: style
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keywords: [reserved-keyword, lowercase, aa0241, codecop, if, then, begin]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Reserved keywords are written in lowercase (CodeCop AA0241)
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## Description
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CodeCop AA0241 requires reserved AL keywords — `if`, `then`, `else`, `begin`, `end`, `var`, `procedure`, `local`, `internal`, `for`, `while`, `repeat`, `until`, `case`, `of`, `do`, `not`, `and`, `or`, `exit`, `break`, `skip`, `quit`, and the rest — to be lowercase. Old Navision and C/AL code used `IF…THEN…BEGIN…END` in uppercase, and that style still lingers in training data and legacy modules. New AL code is lowercase. The rule applies to keywords only — type names (`Record`, `Codeunit`, `Integer`), property names (`Caption`, `ToolTip`), and identifiers are unaffected.
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Test codeunits that retain legacy uppercase forms (`OPENEDIT`, `ASSERTERROR`, `VALUE`) are an accepted exception: the test framework historically uses those identifiers and rewriting them brings no benefit. The rule applies to new code in modified lines, not to long-standing test patterns.
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## Best Practice
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Write keywords lowercase: `if Condition then begin … end;`, `repeat … until Found;`, `for i := 1 to N do …`. The standard AL formatter normalizes casing automatically.
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See sample: [`lowercase-reserved-keywords.good.al`](lowercase-reserved-keywords.good.al).
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## Anti Pattern
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`IF Condition THEN BEGIN DoSomething(); END;`, `REPEAT GetNext(); UNTIL Found;`. Uppercase keywords trip AA0241 and signal C/AL-era code that has not been modernized.
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See sample: [`lowercase-reserved-keywords.bad.al`](lowercase-reserved-keywords.bad.al).
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