{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://opentelemetry.io/schemas/otlp/v1",
  "title": "OpenTelemetry Protocol Data Models",
  "description": "JSON Schema definitions for OTLP trace, metric, and log data models including spans, resources, and attributes.",
  "type": "object",
  "$defs": {
    "Resource": {
      "type": "object",
      "title": "Resource",
      "description": "Describes the entity producing telemetry, identified by attributes such as service.name, service.version, and host.name.",
      "properties": {
        "attributes": {
          "type": "array",
          "description": "Set of key-value pairs describing the resource",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0,
          "description": "Number of attributes dropped due to configured limits"
        }
      },
      "additionalProperties": false
    },
    "InstrumentationScope": {
      "type": "object",
      "title": "InstrumentationScope",
      "description": "Metadata about the instrumentation library that produced the telemetry data.",
      "properties": {
        "name": {
          "type": "string",
          "description": "Name of the instrumentation scope (e.g., library or package name)"
        },
        "version": {
          "type": "string",
          "description": "Version of the instrumentation scope"
        },
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "KeyValue": {
      "type": "object",
      "title": "KeyValue",
      "description": "A key-value pair used for attributes throughout the OTLP data model.",
      "required": ["key", "value"],
      "properties": {
        "key": {
          "type": "string",
          "description": "Attribute key following OpenTelemetry semantic conventions (e.g., service.name, http.method)"
        },
        "value": {
          "$ref": "#/$defs/AnyValue"
        }
      },
      "additionalProperties": false
    },
    "AnyValue": {
      "type": "object",
      "title": "AnyValue",
      "description": "A polymorphic value container supporting string, boolean, integer, double, array, key-value list, and byte values.",
      "properties": {
        "stringValue": {
          "type": "string"
        },
        "boolValue": {
          "type": "boolean"
        },
        "intValue": {
          "type": "string",
          "pattern": "^-?[0-9]+$",
          "description": "64-bit integer encoded as string"
        },
        "doubleValue": {
          "type": "number"
        },
        "arrayValue": {
          "type": "object",
          "properties": {
            "values": {
              "type": "array",
              "items": {
                "$ref": "#/$defs/AnyValue"
              }
            }
          }
        },
        "kvlistValue": {
          "type": "object",
          "properties": {
            "values": {
              "type": "array",
              "items": {
                "$ref": "#/$defs/KeyValue"
              }
            }
          }
        },
        "bytesValue": {
          "type": "string",
          "contentEncoding": "base64"
        }
      },
      "additionalProperties": false
    },
    "Span": {
      "type": "object",
      "title": "Span",
      "description": "A span represents a single operation within a distributed trace. Spans form a tree structure where each span may have a parent and multiple children.",
      "required": ["traceId", "spanId", "name", "kind", "startTimeUnixNano", "endTimeUnixNano"],
      "properties": {
        "traceId": {
          "type": "string",
          "pattern": "^[a-f0-9]{32}$",
          "description": "Globally unique 128-bit trace identifier encoded as 32 lowercase hex characters"
        },
        "spanId": {
          "type": "string",
          "pattern": "^[a-f0-9]{16}$",
          "description": "Unique 64-bit span identifier encoded as 16 lowercase hex characters"
        },
        "traceState": {
          "type": "string",
          "description": "W3C TraceState header value providing vendor-specific trace context"
        },
        "parentSpanId": {
          "type": "string",
          "pattern": "^[a-f0-9]{16}$",
          "description": "Span ID of the parent span; empty for root spans"
        },
        "flags": {
          "type": "integer",
          "description": "W3C trace flags"
        },
        "name": {
          "type": "string",
          "description": "Human-readable name describing the operation (e.g., GET /api/users)"
        },
        "kind": {
          "type": "integer",
          "enum": [0, 1, 2, 3, 4, 5],
          "description": "Span kind: 0=UNSPECIFIED, 1=INTERNAL, 2=SERVER, 3=CLIENT, 4=PRODUCER, 5=CONSUMER"
        },
        "startTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "Start time of the span in nanoseconds since Unix epoch"
        },
        "endTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "End time of the span in nanoseconds since Unix epoch"
        },
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          },
          "description": "Key-value pairs providing additional context about the operation"
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0
        },
        "events": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/SpanEvent"
          },
          "description": "Timed annotations associated with the span (e.g., exception events)"
        },
        "droppedEventsCount": {
          "type": "integer",
          "minimum": 0
        },
        "links": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/SpanLink"
          },
          "description": "References to causally related spans in the same or different traces"
        },
        "droppedLinksCount": {
          "type": "integer",
          "minimum": 0
        },
        "status": {
          "$ref": "#/$defs/SpanStatus"
        }
      },
      "additionalProperties": false
    },
    "SpanEvent": {
      "type": "object",
      "title": "SpanEvent",
      "description": "A timed event within a span, often used to record exceptions or notable moments.",
      "properties": {
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "Event timestamp in nanoseconds since Unix epoch"
        },
        "name": {
          "type": "string",
          "description": "Event name (e.g., exception)"
        },
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "SpanLink": {
      "type": "object",
      "title": "SpanLink",
      "description": "A reference from one span to another, representing a causal relationship.",
      "properties": {
        "traceId": {
          "type": "string",
          "pattern": "^[a-f0-9]{32}$"
        },
        "spanId": {
          "type": "string",
          "pattern": "^[a-f0-9]{16}$"
        },
        "traceState": {
          "type": "string"
        },
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0
        },
        "flags": {
          "type": "integer"
        }
      },
      "additionalProperties": false
    },
    "SpanStatus": {
      "type": "object",
      "title": "SpanStatus",
      "description": "The status of a span indicating success, failure, or unset.",
      "properties": {
        "message": {
          "type": "string",
          "description": "Human-readable status message"
        },
        "code": {
          "type": "integer",
          "enum": [0, 1, 2],
          "description": "Status code: 0=UNSET, 1=OK, 2=ERROR"
        }
      },
      "additionalProperties": false
    },
    "Metric": {
      "type": "object",
      "title": "Metric",
      "description": "A metric measurement containing one of gauge, sum, histogram, exponential histogram, or summary data types.",
      "required": ["name"],
      "properties": {
        "name": {
          "type": "string",
          "description": "Metric name following semantic conventions (e.g., http.server.duration)"
        },
        "description": {
          "type": "string",
          "description": "Human-readable description of the metric"
        },
        "unit": {
          "type": "string",
          "description": "Metric unit following UCUM conventions (e.g., ms, By, 1)"
        },
        "gauge": {
          "$ref": "#/$defs/Gauge"
        },
        "sum": {
          "$ref": "#/$defs/Sum"
        },
        "histogram": {
          "$ref": "#/$defs/Histogram"
        },
        "exponentialHistogram": {
          "$ref": "#/$defs/ExponentialHistogram"
        },
        "summary": {
          "$ref": "#/$defs/Summary"
        }
      },
      "additionalProperties": false
    },
    "Gauge": {
      "type": "object",
      "title": "Gauge",
      "description": "A gauge metric representing instantaneous point-in-time values.",
      "properties": {
        "dataPoints": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/NumberDataPoint"
          }
        }
      },
      "additionalProperties": false
    },
    "Sum": {
      "type": "object",
      "title": "Sum",
      "description": "A sum metric representing cumulative or delta aggregated values.",
      "properties": {
        "dataPoints": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/NumberDataPoint"
          }
        },
        "aggregationTemporality": {
          "type": "integer",
          "enum": [0, 1, 2],
          "description": "0=UNSPECIFIED, 1=DELTA, 2=CUMULATIVE"
        },
        "isMonotonic": {
          "type": "boolean",
          "description": "Whether the sum is monotonically increasing"
        }
      },
      "additionalProperties": false
    },
    "Histogram": {
      "type": "object",
      "title": "Histogram",
      "description": "A histogram metric with explicit bucket boundaries for distribution analysis.",
      "properties": {
        "dataPoints": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/HistogramDataPoint"
          }
        },
        "aggregationTemporality": {
          "type": "integer",
          "enum": [0, 1, 2]
        }
      },
      "additionalProperties": false
    },
    "ExponentialHistogram": {
      "type": "object",
      "title": "ExponentialHistogram",
      "description": "A histogram metric with exponentially growing bucket boundaries.",
      "properties": {
        "dataPoints": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/ExponentialHistogramDataPoint"
          }
        },
        "aggregationTemporality": {
          "type": "integer",
          "enum": [0, 1, 2]
        }
      },
      "additionalProperties": false
    },
    "Summary": {
      "type": "object",
      "title": "Summary",
      "description": "A summary metric with precomputed quantile values.",
      "properties": {
        "dataPoints": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/SummaryDataPoint"
          }
        }
      },
      "additionalProperties": false
    },
    "NumberDataPoint": {
      "type": "object",
      "title": "NumberDataPoint",
      "description": "A single numeric data point for gauge and sum metrics.",
      "properties": {
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "startTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "asDouble": {
          "type": "number"
        },
        "asInt": {
          "type": "string",
          "pattern": "^-?[0-9]+$"
        },
        "exemplars": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/Exemplar"
          }
        },
        "flags": {
          "type": "integer"
        }
      },
      "additionalProperties": false
    },
    "HistogramDataPoint": {
      "type": "object",
      "title": "HistogramDataPoint",
      "description": "A single data point for histogram metrics with explicit bucket boundaries.",
      "properties": {
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "startTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "count": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "sum": {
          "type": "number"
        },
        "bucketCounts": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[0-9]+$"
          }
        },
        "explicitBounds": {
          "type": "array",
          "items": {
            "type": "number"
          }
        },
        "exemplars": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/Exemplar"
          }
        },
        "flags": {
          "type": "integer"
        },
        "min": {
          "type": "number"
        },
        "max": {
          "type": "number"
        }
      },
      "additionalProperties": false
    },
    "ExponentialHistogramDataPoint": {
      "type": "object",
      "title": "ExponentialHistogramDataPoint",
      "description": "A single data point for exponential histogram metrics.",
      "properties": {
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "startTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "count": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "sum": {
          "type": "number"
        },
        "scale": {
          "type": "integer"
        },
        "zeroCount": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "positive": {
          "$ref": "#/$defs/ExponentialHistogramBuckets"
        },
        "negative": {
          "$ref": "#/$defs/ExponentialHistogramBuckets"
        },
        "flags": {
          "type": "integer"
        },
        "exemplars": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/Exemplar"
          }
        },
        "min": {
          "type": "number"
        },
        "max": {
          "type": "number"
        },
        "zeroThreshold": {
          "type": "number"
        }
      },
      "additionalProperties": false
    },
    "ExponentialHistogramBuckets": {
      "type": "object",
      "title": "ExponentialHistogramBuckets",
      "description": "Bucket counts for exponential histogram positive or negative ranges.",
      "properties": {
        "offset": {
          "type": "integer"
        },
        "bucketCounts": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[0-9]+$"
          }
        }
      },
      "additionalProperties": false
    },
    "SummaryDataPoint": {
      "type": "object",
      "title": "SummaryDataPoint",
      "description": "A single data point for summary metrics with precomputed quantiles.",
      "properties": {
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "startTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "count": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "sum": {
          "type": "number"
        },
        "quantileValues": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "quantile": {
                "type": "number",
                "minimum": 0,
                "maximum": 1
              },
              "value": {
                "type": "number"
              }
            }
          }
        },
        "flags": {
          "type": "integer"
        }
      },
      "additionalProperties": false
    },
    "Exemplar": {
      "type": "object",
      "title": "Exemplar",
      "description": "A sample input measurement with optional trace context for linking metrics to traces.",
      "properties": {
        "filteredAttributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          }
        },
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$"
        },
        "asDouble": {
          "type": "number"
        },
        "asInt": {
          "type": "string",
          "pattern": "^-?[0-9]+$"
        },
        "spanId": {
          "type": "string",
          "pattern": "^[a-f0-9]{16}$"
        },
        "traceId": {
          "type": "string",
          "pattern": "^[a-f0-9]{32}$"
        }
      },
      "additionalProperties": false
    },
    "LogRecord": {
      "type": "object",
      "title": "LogRecord",
      "description": "A single log record representing a timestamped event with severity level, body content, and optional trace correlation.",
      "properties": {
        "timeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "Log record timestamp in nanoseconds since Unix epoch"
        },
        "observedTimeUnixNano": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "Time when the log record was observed by the collection system"
        },
        "severityNumber": {
          "type": "integer",
          "minimum": 1,
          "maximum": 24,
          "description": "Numeric severity (1-4=TRACE, 5-8=DEBUG, 9-12=INFO, 13-16=WARN, 17-20=ERROR, 21-24=FATAL)"
        },
        "severityText": {
          "type": "string",
          "description": "Human-readable severity text (e.g., INFO, ERROR)"
        },
        "body": {
          "$ref": "#/$defs/AnyValue",
          "description": "The log record body content"
        },
        "attributes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/KeyValue"
          },
          "description": "Additional structured metadata about the log record"
        },
        "droppedAttributesCount": {
          "type": "integer",
          "minimum": 0
        },
        "flags": {
          "type": "integer",
          "description": "Trace flags for log-to-trace correlation"
        },
        "traceId": {
          "type": "string",
          "pattern": "^[a-f0-9]{32}$",
          "description": "Trace ID for correlating this log with distributed traces"
        },
        "spanId": {
          "type": "string",
          "pattern": "^[a-f0-9]{16}$",
          "description": "Span ID for correlating this log with a specific span"
        }
      },
      "additionalProperties": false
    }
  }
}