Update purefa-metrics.md

Author: chrroberts-pure

specification/metrics/purefa-metrics.md

@@ -62,15 +62,17 @@ This document describes the semantic conventions for Pure FlashArray Metrics.
 
 **Description:** FlashArray Open Alerts
 
-| Status    | Name               | Description                  | Units | Metric Type ([*](https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#metric-types)) | Value Type | Attribute Key    | Attribute Values                                                                                                   |
-| --------- | ------------------ | ---------------------------- | ----- | ----------------------------------------------------------------------------------------------------------------------- | ---------- | ---------------- | ------------------------------------------------------------------------------------------------------------------ |
-| Available | purefa_alerts_open | FlashArray open alert events |       | Gauge                                                                                                                   | Double     | `component_type` | `chassis`, `drive_bay`, `nvram_bay`, `power_supply`, `temp_sensor`, `controller`, `eth_port`, `cooling`, `fc_port` |
-|           |                    |                              |       |                                                                                                                         |            | `severity`       | `info`, `warning`, `critical`, `hidden`                                                                            |
-|           |                    |                              |       |                                                                                                                         |            | `created`        | (time the alert was created in milliseconds since the UNIX epoch)                                                  |
-|           |                    |                              |       |                                                                                                                         |            | `name`           | (a locally unique, system-generated name)                                                                          |
-|           |                    |                              |       |                                                                                                                         |            | `code`           | (code number of the event)                                                                                         |
-|           |                    |                              |       |                                                                                                                         |            | `summary`        | (summary of the alert)                                                                                             |
-|           |                    |                              |       |                                                                                                                         |            | `issue`          | (information about the alert cause)                                                                                |
+| Status    | Name               | Description                                                         | Units | Metric Type ([*](https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#metric-types)) | Value Type | Attribute Key    | Attribute Values                                                                                                   |
+| --------- | ------------------ | ------------------------------------------------------------------- | ----- | ----------------------------------------------------------------------------------------------------------------------- | ---------- | ---------------- | ------------------------------------------------------------------------------------------------------------------ |
+| Available | purefa_alerts_open | FlashArray open alert event                                         |       | Gauge                                                                                                                   | Double     | `name`           | (name)                                                                                                             |
+|           |                    | The code number of the event                                        |       |                                                                                                                         |            | `code`           | (code)                                                                                                             |
+|           |                    |                                                                     |       |                                                                                                                         |            | `component_type` | `chassis`, `drive_bay`, `nvram_bay`, `power_supply`, `temp_sensor`, `controller`, `eth_port`, `cooling`, `fc_port` |
+|           |                    | The time the alert was created in milliseconds since the UNIX epoch |       |                                                                                                                         |            | `created`        | (created)                                                                                                          |
+|           |                    | Information about the alert cause                                   |       |                                                                                                                         |            | `issue`          | (issue)                                                                                                            |
+|           |                    | The category of the alert.                                          |       |                                                                                                                         |            | `category`       | `array`, `hardware`, `software`                                                                                    |
+|           |                    |                                                                     |       |                                                                                                                         |            | `severity`       | `info`, `warning`, `critical`, `hidden`                                                                            |
+|           |                    | A summary of the alert                                              |       |                                                                                                                         |            | `summary`        | (summary)                                                                                                          |
+|           |
 
 
 ### `purefa_array` - FlashArray metrics