13. A computer-readable storage media embodying a schema comprising: multiple nodes arranged in a hierarchical structure, wherein the hierarchical structure describes a printer's properties and capabilities; wherein individual nodes are associated with printer properties or data values; and wherein the schema is protocol-independent allowing one or more standardized schema queries to be constructed by one or more devices to query the printer for information associated with its properties and capabilities, wherein each of the one or more schema queries is defined by the schema, at least one schema query being directed to discovering a particular data value by having syntax expressly identifying a data value node associated with the particular data value, and wherein one property node comprises at least one of: a printer information node that pertains to data that is associated with the printer, wherein the printer information node comprises a child manufacturer node associated with a printer manufacturer; a configuration node that pertains to configuration data that is associated with the printer, and wherein the configuration node comprises at least one of: a child memory node that contains values associated with the memory installed on the printer, and wherein the memory node comprises a child node associated with memory size and a child node associated with an amount of memory available to a Postscript interpreter; or a child hard disk node that contains values associated with a hard disk that is installed on the printer, and wherein the hard disk node comprises a child node that represents whether a hard disk is installed on the printer, a child node that represents the capacity of an installed hard disk, and a child node that represents currently available free space of an installed hard disk; a consumables node that pertains to information associated with consumable supplies in the printer, and wherein the consumables node comprises a child type node that corresponds to a consumable type on the printer, wherein the child type node comprises a child color node that corresponds to the color of a consumable, wherein the color node comprises a child installed node that represents whether a consumable is installed on the printer, a child display name node that represents a localized name for a particular consumable, and a child level node that represents a current level of a referenced consumable; or a layout node that pertains to data associated with how a print job is applied on a page, wherein the layout node comprises a child number up node that contains information associated with how many logical pages should be placed on a single page of media and which direction to layout multiple pages.
13. A computer-readable storage media embodying a schema comprising: multiple nodes arranged in a hierarchical structure, wherein the hierarchical structure describes a printer's properties and capabilities; wherein individual nodes are associated with printer properties or data values; and wherein the schema is protocol-independent allowing one or more standardized schema queries to be constructed by one or more devices to query the printer for information associated with its properties and capabilities, wherein each of the one or more schema queries is defined by the schema, at least one schema query being directed to discovering a particular data value by having syntax expressly identifying a data value node associated with the particular data value, and wherein one property node comprises at least one of: a printer information node that pertains to data that is associated with the printer, wherein the printer information node comprises a child manufacturer node associated with a printer manufacturer; a configuration node that pertains to configuration data that is associated with the printer, and wherein the configuration node comprises at least one of: a child memory node that contains values associated with the memory installed on the printer, and wherein the memory node comprises a child node associated with memory size and a child node associated with an amount of memory available to a Postscript interpreter; or a child hard disk node that contains values associated with a hard disk that is installed on the printer, and wherein the hard disk node comprises a child node that represents whether a hard disk is installed on the printer, a child node that represents the capacity of an installed hard disk, and a child node that represents currently available free space of an installed hard disk; a consumables node that pertains to information associated with consumable supplies in the printer, and wherein the consumables node comprises a child type node that corresponds to a consumable type on the printer, wherein the child type node comprises a child color node that corresponds to the color of a consumable, wherein the color node comprises a child installed node that represents whether a consumable is installed on the printer, a child display name node that represents a localized name for a particular consumable, and a child level node that represents a current level of a referenced consumable; or a layout node that pertains to data associated with how a print job is applied on a page, wherein the layout node comprises a child number up node that contains information associated with how many logical pages should be placed on a single page of media and which direction to layout multiple pages. 42. The computer-readable storage media of claim 13 , wherein one property node comprises a finishing node that pertains to how a print job is composed upon completion, wherein the finishing node comprises a child output bins node that contains information that describes a printer's output bins, wherein the child output bins node comprises a child current value node that represents a current default output bin, and a child tray name bin associated with the name of an output bin, wherein the tray name node comprise a child installed node that represents whether an associated bin is installed, a child display name node that represents a localized name, a child capacity node that represents capacity in sheets of an associated bin, and a child level node that represents percent of remaining capacity in an associated bin.