This schema is specified in IEEE Std 1671.2-2008, "IEEE Trial-Use Standard for Automatic Test Markup Language (ATML) for Exchanging Automatic Test Equipment and Test Information via XML:Exchanging Instrument Descriptions." This schema is a World Wide Web Consortium (W3C) Extensible Markup Language (XML) binding of the ATML Instrument Description component defined in IEEE Std 1671.2-2008,"IEEE Trial-Use Standard for Automatic Test Markup Language (ATML) for Exchanging Automatic Test Equipment and Test Information via XML:Exchanging Instrument Descriptions." The purpose of this schema is to allow the creation of IEEE Std 1671.2-2008 Instrument Description instance documents. This schema uses the W3C XML Schema definition language as the encoding. This allows for interoperability and the exchange of ATML component instances between various systems. This schema shall not be modified but may be included in derivative works. Copyright (c) 2009 Institute of Electrical and Electronics Engineers, Inc. USE AT YOUR OWN RISK Instrument Description The bus type is specified by specifying a type derivied from the "Bus" abstract type. The schema includes derived types for common instrumentation control buses. Keyword-value pair for identifying power-on defaults. Resources are the physical entities in the instrument that provides the source and measure capabilities. Abstract type for identifying the bus used to communicate with the instrument VXI Bus The amount of dynamic current in amps consumed by the device on each of the VXI backplane voltage lines. The amount of peak current in amps consumed by the device on each of the VXI backplane voltage lines. The number of ECL trigger lines concurrently input or sensed. The number of TTL trigger lines concurrently input or sensed. Identifies the keying class (1-6) defined by the VXI specification. Classes 7, 8, and 9 are defined as follows: Class 7 – No local bus Class 8 – Sensor +/-16V Class 9 – Sensor +/-42V Top Key supports C size modules. Bottom Key supports D size modules (Bottom Key on C size modules is always 7). The module cooling as back pressure in mm/H2O Represents Module Cooling as air flow in liters/sec. Identifies the supported clock sources for the instrument. Identifies the type of VXI address space needed by the instrument or module in addition to A16. The number of interrupt lines utilized by a device. The weight of the module in kilograms per slot occupied. The number of slots consumed. This type is used to store the amount of current in amps consumed by the device for each of the VXI backplane voltages. Used to specify the number of triggers concurrently input or sensed. IEEE-488 bus VME Bus Ethernet RS-232 USB Used to identify the version of USB supported. IEEE--1394 LXI PCI PCI Express PXI The amount of dynamic current in amps consumed by the device on each of the PXI backplane voltage lines. The amount of peak current in amps consumed by the device on each of the PXI backplane voltage lines. Identifies the supported clock sources for the instrument. The number of PXI slots provided or consumed by this device. A string specifying which of the defined sizes this PXI component supports. The string shall be one of the following: 3U, 6U. For a PXI module, this is a negative floating point number representing the weight of the module in kilogram per slot occupied. For a PXI mainframe, this is a positive floating point number representing the weight of the mainframe in kilogram per slot provided. This type is used to store the amount of current in amps consumed by the device PXI Express PXI and VXI device categories