This XML code defines an instrumentation manifest for a Windows-based...

August 18, 2025 at 01:44 AM

<?xml version='1.0' encoding='utf-8' standalone='yes'?>
<instrumentationManifest
    xmlns="http://schemas.microsoft.com/win/2004/08/events"
    xmlns:trace="http://schemas.microsoft.com/win/2004/08/events/trace"
    xmlns:win="http://manifests.microsoft.com/win/2004/08/windows/events"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://schemas.microsoft.com/win/2004/08/events eventman.xsd"
    >
  <instrumentation>
    <events>
      <provider
          guid="{9CC69D1C-7917-4ACD-8066-6BF8B63E551B}"
          messageFileName="C:\dev\AppV\Main\target\Debug\x86\Bin\EventLogMessages.dll"
          name="Microsoft-AppV-ServiceLog"
          resourceFileName="C:\dev\AppV\Main\target\Debug\x86\Bin\EventLogMessages.dll"
          symbol="AppVClientDbg"
          >
        <events>
          <event
              channel="Microsoft-AppV-Client/Debug"
              keywords="DebugTrace "
              level="win:Verbose"
              message="$(string.Microsoft-AppV-Client.event.1.message)"
              symbol="LogDebugMessage"
              template="_String1"
              value="1"
              version="0"
              />
          <event
              channel="Microsoft-AppV-Client/Debug"
              keywords="DebugTrace "
              level="win:Verbose"
              message="$(string.Microsoft-AppV-Client.event.1000.message)"
              opcode="Service"
              symbol="LogDebugServiceMessage"
              task="DBG-AppVClient"
              template="_WString1"
              value="2"
              version="0"
              />
          <event
              channel="Microsoft-AppV-Client/Debug"
              keywords="DebugTrace "
              level="win:Verbose"
              message="$(string.Microsoft-AppV-Client.event.1001.message)"
              opcode="Service"
              symbol="LogDebugServiceMessageX"
              task="DBG-AppVClient"
              template="Message-Function-Line"
              value="3"
              version="0"
              />
        </events>
        <levels/>
        <tasks>
          <task
              eventGUID="{C79AA2CE-84EB-4F7A-97C6-BA0E8EAF643C}"
              message="$(string.Microsoft-AppV-Client.task.DbgAppAgent.message)"
              name="DBG-AppVClient"
              symbol="DbgAppVClient"
              value="1"
              />
        </tasks>
        <opcodes>
          <opcode
              message="$(string.Microsoft-MDOP-AppV.opcode.Service.message)"
              name="Service"
              symbol="ServiceMsg"
              value="10"
              />
        </opcodes>
        <channels>
          <channel
              chid="Microsoft-AppV-Client/Debug"
              enabled="false"
              isolation="Application"
              name="Microsoft-AppV-Client/Debug"
              symbol="AppVClientDebugChannel"
              type="Debug"
              />
        </channels>
        <keywords>
          <keyword
              mask="0x1"
              message="$(string.Microsoft-AppV-Client.Keyword.DEBUG_TRACE.message)"
              name="DebugTrace"
              symbol="DEBUG_TRACE"
              />
        </keywords>
        <templates>
          <template tid="_String1">
            <data
                inType="win:UnicodeString"
                name="stringValue1"
                outType="xs:string"
                />
          </template>
          <template tid="_WString1">
            <data
                inType="win:UnicodeString"
                name="WString1"
                outType="xs:string"
                />
          </template>
          <template tid="Message-Function-Line">
            <data
                inType="win:UnicodeString"
                name="Message"
                outType="xs:string"
                />
            <data
                inType="win:UnicodeString"
                name="Function"
                outType="xs:string"
                />
            <data
                inType="win:UInt32"
                name="Line"
                outType="xs:unsignedInt"
                />
          </template>
        </templates>
      </provider>
    </events>
  </instrumentation>
  <localization>
    <resources culture="en-US">
      <stringTable>
        <string
            id="level.Critical"
            value="Critical"
            />
        <string
            id="level.Error"
            value="Error"
            />
        <string
            id="level.Informational"
            value="Information"
            />
        <string
            id="level.LogAlways"
            value="Log Always"
            />
        <string
            id="level.Verbose"
            value="Verbose"
            />
        <string
            id="level.Warning"
            value="Warning"
            />
        <string
            id="Microsoft-MDOP-AppV.opcode.Service.message"
            value="AppV Client Service"
            />
        <string
            id="Microsoft-AppV-Client.event.1.message"
            value="%1"
            />
        <string
            id="Microsoft-AppV-Client.event.1000.message"
            value="%1"
            />
        <string
            id="Microsoft-AppV-Client.event.1001.message"
            value="%1 [%2; %3]"
            />
        <string
            id="Microsoft-AppV-Client.Keyword.DEBUG_TRACE.message"
            value="Debug Out Messages."
            />
        <string
            id="Microsoft-AppV-Client.task.DbgAppAgent.message"
            value="Debug AppV Client"
            />
        <string
            id="opcode.Info"
            value="Info"
            />
        <string
            id="opcode.Start"
            value="Start"
            />
        <string
            id="opcode.Stop"
            value="Stop"
            />
        <string
            id="task.None"
            value="None"
            />
      </stringTable>
    </resources>
  </localization>
</instrumentationManifest>

This XML code defines an instrumentation manifest for a Windows-based event tracing and logging system. Here's what it does:

Instrumentation Manifest:
- An instrumentation manifest provides metadata declarations for events, channels, levels, tasks, opcodes, keywords, and other elements that are used for tracing and logging diagnostics in an application. It is primarily used in the context of Event Tracing for Windows (ETW).
Manifest Structure Overview:
- The root element is <instrumentationManifest>, which contains details for instrumentation and localization, defining how an application emits and describes diagnostic events.

Key Elements:

Provider:
- The <provider> element is defined with attributes like guid, name, and file locations (messageFileName and resourceFileName) to identify and describe the event source.
- In this case, the provider has the name "Microsoft-AppV-ServiceLog" which is related to the App-V (Application Virtualization) Client logging.
Events:
- Inside the <events> section, individual events are defined, each with:
  - A channel where the event belongs (e.g., "Microsoft-AppV-Client/Debug").
  - level, specifying the severity (e.g., "win:Verbose" for detailed debugging information).
  - message, a reference to a localized message string.
  - keywords, which classify events by purpose (e.g., "DebugTrace").
  - A template, defining the data payload emitted with the event.
  - An opcode and task to provide further categorization for the event.
Levels, Tasks, Opcodes, and Keywords:
- The manifest defines:
  - Levels: Represent logging levels like Critical, Error, Informational, Verbose, etc., though not fully detailed here.
  - Tasks and Opcodes: These provide specific categories and operational codes for related diagnostic events.
  - Keywords: A mechanism to classify or filter logged events. For example, "DebugTrace" is used here to classify debug-related events.
Channels:
- The <channels> section defines properties for channels where events can be logged.
- Example: The "Microsoft-AppV-Client/Debug" channel is defined as a debug channel for the provider, but it's disabled (enabled="false") by default.
Templates:
- The <templates> section defines how the data for each event is structured and transmitted.
- Example templates:
  - _String1 includes one string parameter.
  - Message-Function-Line includes multiple fields: Message, Function, and Line (e.g., a log message, the function name, and a line number).
Localization:
- The <localization> section includes localized resources like string tables.
- Each string entry provides language-specific text for levels, messages, tasks, and opcodes referred to by the instrumentation section.

Purpose of the Code:

This manifest is part of a diagnostic and debugging setup for the Microsoft App-V Client, where:

Events are emitted during application execution, categorized by channels, tasks, opcodes, and keywords.
Event consumers (like the Windows Event Viewer) display the information using the structured metadata and localized messages provided in this file.
This supports debugging and monitoring the App-V Client by capturing structured diagnostic traces.

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This XML code defines an **instrumentation manifest** for a Windows-based...

Key Elements:

Purpose of the Code:

This XML code defines an instrumentation manifest for a Windows-based...