{"schema":"cpc-unicode-answer-v1","question":"What is a Unicode control character?","answer":"A control code rather than an ordinary visible symbol. Code points: U+0007. Programs may interpret, ignore, escape or reject it. No fallback is suggested. Font coverage, shaping, and application acceptance were not tested, so those results are unknown.","unicodeVersion":"18.0.0","purpose":"general","citation":"Do not invent a platform-support claim from this data.","page":"/answers/what-a-control-character-is/","markdown":"/answers/what-a-control-character-is.md","sample":"\u0007","codepoints":[{"codepoint":"U+0007","name":"ALERT","displayLabel":"[U+0007]","warnings":["control"],"explanations":[{"id":"control","title":"Control character","behavior":"A control code rather than an ordinary visible symbol.","limitation":"Programs may interpret, ignore, escape or reject it.","fix":"Use an explicit escaped representation when discussing a control code; do not paste it invisibly into untrusted contexts.","source":"https://www.unicode.org/reports/tr44/","alternatives":[],"evidenceTier":"standards-informed-editorial","evidence":{"behavior":"standards-informed","compatibility":"not-tested","repair":"editorial-guidance"}}]}],"comparison":null,"graphemes":{"status":"available","method":"runtime-intl-segmenter","unicodeDataVersion":"runtime-unknown","count":1,"segments":[{"text":"\u0007","utf16Offset":0,"codepoints":["U+0007"]}]},"normalizationChanged":{"NFC":false,"NFD":false,"NFKC":false,"NFKD":false},"normalizationUnicodeDataVersion":"runtime-unknown","targetCompatibility":{"status":"unknown","evidenceTier":"not-tested","purpose":"general","explanation":"No OS, font, browser, application, field policy or rendering engine was tested. Unicode validity and segmentation do not establish actual display or acceptance."}}