sourcemeta · jviotti · Nov 5, 2025 · Nov 5, 2025
diff --git a/README.markdown b/README.markdown
@@ -77,6 +77,7 @@ expressed as JSON Schema definitions.
 | JSON-RPC | [JSON-RPC 2.0](https://www.jsonrpc.org/specification) | JSON-RPC 2.0 Specification |
 | JSON Schema | [Draft 2020-12](https://json-schema.org/draft/2020-12/json-schema-core) | JSON Schema: A Media Type for Describing JSON Documents |
 | W3C | [XML Schema Part 2](https://www.w3.org/TR/xmlschema-2/) | XML Schema Datatypes Second Edition |
+| XBRL International | [XBRL 2.1](https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html) | Extensible Business Reporting Language (XBRL) 2.1 |
 
 To request coverage of another standard, please [open an issue on
 GitHub](https://github.com/sourcemeta/std/issues).

diff --git a/schemas/xbrl/instance/2003/any-uri-item-type.json b/schemas/xbrl/instance/2003/any-uri-item-type.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL anyURIItemType",
+  "description": "XBRL item type for Uniform Resource Identifiers (URIs). Based on W3C XML Schema anyURI",
+  "examples": [
+    "https://example.com",
+    "http://test.org/path",
+    "urn:isbn:0-486-27557-4"
+  ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/any-uri.json"
+}
diff --git a/schemas/xbrl/instance/2003/base64-binary-item-type.json b/schemas/xbrl/instance/2003/base64-binary-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL base64BinaryItemType",
+  "description": "XBRL item type for Base64-encoded binary data. Based on W3C XML Schema base64Binary",
+  "examples": [ "SGVsbG8=", "V29ybGQ=", "VGVzdA==" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/base64-binary.json"
+}
diff --git a/schemas/xbrl/instance/2003/boolean-item-type.json b/schemas/xbrl/instance/2003/boolean-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL booleanItemType",
+  "description": "XBRL item type for boolean values (true or false). Based on W3C XML Schema boolean",
+  "examples": [ true, false, true ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/boolean.json"
+}
diff --git a/schemas/xbrl/instance/2003/byte-item-type.json b/schemas/xbrl/instance/2003/byte-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL byteItemType",
+  "description": "XBRL item type for signed 8-bit integers. Based on W3C XML Schema byte",
+  "examples": [ 42, -100, 0 ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/byte.json"
+}
diff --git a/schemas/xbrl/instance/2003/date-item-type.json b/schemas/xbrl/instance/2003/date-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL dateItemType",
+  "description": "XBRL item type for calendar dates. Based on W3C XML Schema date",
+  "examples": [ "2002-10-10", "2002-10-10Z", "2002-10-10+13:00" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/date.json"
+}
diff --git a/schemas/xbrl/instance/2003/date-time-item-type.json b/schemas/xbrl/instance/2003/date-time-item-type.json
@@ -0,0 +1,24 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL dateTimeItemType",
+  "description": "XBRL item type for dates or date-time values. Union of W3C XML Schema date and dateTime types",
+  "examples": [
+    "2002-10-10",
+    "2002-10-10T12:00:00-05:00",
+    "2002-10-10Z",
+    "2002-05-30T09:00:00"
+  ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "anyOf": [
+    {
+      "$ref": "../../../w3c/xmlschema/2001/date.json"
+    },
+    {
+      "$ref": "../../../w3c/xmlschema/2001/date-time.json"
+    }
+  ]
+}
diff --git a/schemas/xbrl/instance/2003/decimal-item-type.json b/schemas/xbrl/instance/2003/decimal-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL decimalItemType",
+  "description": "XBRL item type for decimal values. Based on W3C XML Schema decimal",
+  "examples": [ "123.45", "-67.89", "0.0" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/decimal.json"
+}
diff --git a/schemas/xbrl/instance/2003/double-item-type.json b/schemas/xbrl/instance/2003/double-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL doubleItemType",
+  "description": "XBRL item type for double-precision 64-bit floating point numbers. Based on W3C XML Schema double",
+  "examples": [ 123.45, -67.89, 0.0 ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/double.json"
+}
diff --git a/schemas/xbrl/instance/2003/duration-item-type.json b/schemas/xbrl/instance/2003/duration-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL durationItemType",
+  "description": "XBRL item type for time durations. Based on W3C XML Schema duration",
+  "examples": [ "P1Y2M3DT10H30M", "P3Y6M4DT12H30M5S", "-P120D" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/duration.json"
+}
diff --git a/schemas/xbrl/instance/2003/float-item-type.json b/schemas/xbrl/instance/2003/float-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL floatItemType",
+  "description": "XBRL item type for single-precision 32-bit floating point numbers. Based on W3C XML Schema float",
+  "examples": [ 123.45, -67.89, 0.0 ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/float.json"
+}
diff --git a/schemas/xbrl/instance/2003/fraction-item-type.json b/schemas/xbrl/instance/2003/fraction-item-type.json
@@ -0,0 +1,30 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL fractionItemType",
+  "description": "XBRL item type for fractional values with explicit numerator and denominator. Represented as a two-element array of W3C XML Schema decimal values",
+  "examples": [
+    [ "1.5", "2" ],
+    [ "-100", "3.5" ],
+    [ "5", "-2.5" ],
+    [ "0", "1" ]
+  ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "type": "array",
+  "maxItems": 2,
+  "minItems": 2,
+  "prefixItems": [
+    {
+      "$ref": "../../../w3c/xmlschema/2001/decimal.json"
+    },
+    {
+      "$ref": "../../../w3c/xmlschema/2001/decimal.json",
+      "not": {
+        "pattern": "^-?0+(\\.0+)?$"
+      }
+    }
+  ]
+}
diff --git a/schemas/xbrl/instance/2003/g-day-item-type.json b/schemas/xbrl/instance/2003/g-day-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL gDayItemType",
+  "description": "XBRL item type for recurring Gregorian calendar days. Based on W3C XML Schema gDay",
+  "examples": [ "---01", "---15", "---31" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/g-day.json"
+}
diff --git a/schemas/xbrl/instance/2003/g-month-day-item-type.json b/schemas/xbrl/instance/2003/g-month-day-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL gMonthDayItemType",
+  "description": "XBRL item type for recurring Gregorian calendar month-day combinations. Based on W3C XML Schema gMonthDay",
+  "examples": [ "--01-15", "--12-25", "--07-04" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/g-month-day.json"
+}
diff --git a/schemas/xbrl/instance/2003/g-month-item-type.json b/schemas/xbrl/instance/2003/g-month-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL gMonthItemType",
+  "description": "XBRL item type for Gregorian calendar months. Based on W3C XML Schema gMonth",
+  "examples": [ "--01", "--06", "--12" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/g-month.json"
+}
diff --git a/schemas/xbrl/instance/2003/g-year-item-type.json b/schemas/xbrl/instance/2003/g-year-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL gYearItemType",
+  "description": "XBRL item type for Gregorian calendar years. Based on W3C XML Schema gYear",
+  "examples": [ "2023", "1999", "2024" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/g-year.json"
+}
diff --git a/schemas/xbrl/instance/2003/g-year-month-item-type.json b/schemas/xbrl/instance/2003/g-year-month-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL gYearMonthItemType",
+  "description": "XBRL item type for Gregorian calendar year-month combinations. Based on W3C XML Schema gYearMonth",
+  "examples": [ "2023-01", "1999-12", "2024-06" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/g-year-month.json"
+}
diff --git a/schemas/xbrl/instance/2003/hex-binary-item-type.json b/schemas/xbrl/instance/2003/hex-binary-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL hexBinaryItemType",
+  "description": "XBRL item type for hexadecimal-encoded binary data. Based on W3C XML Schema hexBinary",
+  "examples": [ "48656C6C6F", "DEADBEEF", "0123456789ABCDEF" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/hex-binary.json"
+}
diff --git a/schemas/xbrl/instance/2003/int-item-type.json b/schemas/xbrl/instance/2003/int-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL intItemType",
+  "description": "XBRL item type for signed 32-bit integers. Based on W3C XML Schema int",
+  "examples": [ 42, -100, 0 ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/int.json"
+}
diff --git a/schemas/xbrl/instance/2003/integer-item-type.json b/schemas/xbrl/instance/2003/integer-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL integerItemType",
+  "description": "XBRL item type for arbitrary-precision signed integers. Based on W3C XML Schema integer",
+  "examples": [ "42", "-100", "0" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/integer.json"
+}
diff --git a/schemas/xbrl/instance/2003/language-item-type.json b/schemas/xbrl/instance/2003/language-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL languageItemType",
+  "description": "Non-numeric item type based on the XML Schema built-in types that are derived by restriction and/or list from string",
+  "examples": [ "en", "en-US", "fr-CA" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/language.json"
+}
diff --git a/schemas/xbrl/instance/2003/long-item-type.json b/schemas/xbrl/instance/2003/long-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL longItemType",
+  "description": "XBRL item type for signed 64-bit integers. Based on W3C XML Schema long",
+  "examples": [ 42, -100, 0 ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/long.json"
+}
diff --git a/schemas/xbrl/instance/2003/monetary-item-type.json b/schemas/xbrl/instance/2003/monetary-item-type.json
@@ -0,0 +1,34 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL monetaryItemType",
+  "description": "The monetary type serves as the datatype for those financial concepts in a taxonomy which denote units in a currency",
+  "examples": [
+    {
+      "value": "100.50",
+      "currency": "USD"
+    },
+    {
+      "value": "-25.00",
+      "currency": "EUR"
+    },
+    {
+      "value": "0",
+      "currency": "GBP"
+    }
+  ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "type": "object",
+  "required": [ "value", "currency" ],
+  "properties": {
+    "value": {
+      "$ref": "../../../w3c/xmlschema/2001/decimal.json"
+    },
+    "currency": {
+      "$ref": "../../../iso/currency/2015/alpha-currency.json"
+    }
+  }
+}
diff --git a/schemas/xbrl/instance/2003/name-item-type.json b/schemas/xbrl/instance/2003/name-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL NameItemType",
+  "description": "Non-numeric item type based on the XML Schema built-in types that are derived by restriction and/or list from string",
+  "examples": [ "Name1", "element-name", "my:name" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/name.json"
+}
diff --git a/schemas/xbrl/instance/2003/ncname-item-type.json b/schemas/xbrl/instance/2003/ncname-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL NCNameItemType",
+  "description": "Non-numeric item type based on the XML Schema built-in types that are derived by restriction and/or list from string",
+  "examples": [ "elementName", "attribute1", "localName" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/ncname.json"
+}
diff --git a/schemas/xbrl/instance/2003/negative-integer-item-type.json b/schemas/xbrl/instance/2003/negative-integer-item-type.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "XBRL negativeIntegerItemType",
+  "description": "XBRL item type for arbitrary-precision negative integers (less than zero). Based on W3C XML Schema negativeInteger",
+  "examples": [ "-42", "-100", "-1" ],
+  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
+  "x-links": [
+    "https://www.xbrl.org/Specification/XBRL-2.1/REC-2003-12-31/XBRL-2.1-REC-2003-12-31+corrected-errata-2013-02-20.html#_5.1.1.3",
+    "https://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"
+  ],
+  "$ref": "../../../w3c/xmlschema/2001/negative-integer.json"
+}