<!ELEMENT SUB_ASSET_RECORD (assetNumber, partNumber, identification?, acquisitionCost?, salvageValue?, deqChecksum?)> <!ELEMENT assetNumber (#PCDATA)> <!ELEMENT partNumber (#PCDATA)> <!ELEMENT identification (#PCDATA)> <!ELEMENT acquisitionCost (#PCDATA)> <!ELEMENT salvageValue (#PCDATA)> <!ELEMENT deqChecksum (#PCDATA)>