Added Boolean category

Frontend/src/assets/tooltips/xpath/xpath2.json

@@ -164,6 +164,85 @@
             }
         ]
     },
+    {
+        "name": "Boolean",
+        "entries": [
+            {
+                "name": "boolean()",
+                "description": "Computes the effective boolean value of the sequence $arg.",
+                "arguments": [
+                    {
+                        "type": "item()* (One or more)",
+                        "description": "$arg"
+                    }
+                ],
+                "output": "xs:boolean? (Optional)",
+                "examples": [
+                    {
+                        "command": "boolean(0)",
+                        "output": "false"
+                    },
+                    {
+                        "command": "boolean(())",
+                        "output": "false"
+                    },
+                    {
+                        "command": "boolean(1)",
+                        "output": "true"
+                    }
+                ],
+                "documentationReferenceURL": "https://www.w3.org/TR/xquery-operators/#func-boolean"
+            },
+            {
+                "name": "true()",
+                "description": "Returns the xs:boolean value true. Equivalent to xs:boolean('1').",
+                "arguments": [],
+                "output": "xs:boolean",
+                "examples": [
+                    {
+                        "command": "true()",
+                        "output": "true"
+                    }
+                ],
+                "documentationReferenceURL": "https://www.w3.org/TR/xquery-operators/#func-true"
+            },
+            {
+                "name": "false()",
+                "description": "Returns the xs:boolean value false. Equivalent to xs:boolean('0').",
+                "arguments": [],
+                "output": "xs:boolean",
+                "examples": [
+                    {
+                        "command": "false()",
+                        "output": "false"
+                    }
+                ],
+                "documentationReferenceURL": "https://www.w3.org/TR/xquery-operators/#func-false"
+            },
+            {
+                "name": "not()",
+                "description": "$arg is first reduced to an effective boolean value by applying the fn:boolean() function. Returns true if the effective boolean value is false, and false if the effective boolean value is true.",
+                "arguments": [
+                    {
+                        "type": "item()",
+                        "description": "$arg"
+                    }
+                ],
+                "output": "xs:boolean",
+                "examples": [
+                    {
+                        "command": "not(false())",
+                        "output": "true"
+                    },
+                    {
+                        "command": "not(true())",
+                        "output": "false"
+                    }
+                ],
+                "documentationReferenceURL": "https://www.w3.org/TR/xquery-operators/#func-not"
+            }
+        ]
+    },
     {
         "name": "Number",
         "entries": [