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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Using reserved word 'in' as key in jsonNode fails","articleBody":"Hi,\r\n\r\nwhen I try to parse the json payload with a reserved keyword 'in'\r\n\r\n```\r\n\texpression = \"in\";\r\n\tString jsonPayload = \"{ \\\"in\\\":1}\";\r\n\tSystem.out.println(\"Using JSON:\\n\" + mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonObj));\r\n\tSystem.out.println(\"expression=\" + expression);\r\n\texpr = Expressions.parse(expression);\r\n```\r\n\r\nan exception is thrown:\r\n\r\n```\r\n\r\ncom.api.jsonata4java.expressions.ParseException: line 1:0 at [@0,0:1='in',\u003c5\u003e,1:0]: mismatched input 'in' expecting {'(', 'true', 'false', STRING, 'null', '[', '{', '$', '$$', '**', NUMBER, FUNCTIONID, '*', '/', '-', '%', VAR_ID, ID}\r\n\r\n        at com.api.jsonata4java.expressions.Expressions.parse(Expressions.java:113)\r\n        at com.mytest.jsonnata.Test.test2(Test.java:105)\r\n        at com.mytest.jsonnata.Test.main(Test.java:17)\r\nline 1:0 at [@0,0:1='in',\u003c5\u003e,1:0]: mismatched input 'in' expecting {'(', 'true', 'false', STRING, 'null', '[', '{', '$', '$$', '**', NUMBER, FUNCTIONID, '*', '/', '-', '%', VAR_ID, ID}\r\n```\r\n\r\nWhereas when I use 'ink' instead of 'in' the test works.\r\n\r\nI tested with version 2.5.1","author":{"url":"https://github.com/ck-c8y","@type":"Person","name":"ck-c8y"},"datePublished":"2024-08-30T08:22:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/317/JSONata4Java/issues/317"}