This attribute group aggregates attributes that can be used for specifying type of location This group includes following attributes: locatorType specifies location type (URL or OTHER) otherLocatorType specifies location type in case locatorType has value of OTHER This attribute group aggregates attributes that can be used for specifying registration information. This group includes following attributes: registrationAuthority - the authority that issued the registration registeredId - the id for the registration Entity of this type is used to indicated version of XFDU XML schema allows third parties to define extensions to the XFDU from a namespace controlled by the third party An element of this type encapsulates information about the position of the encapsulating XFDU package In a sequence of physical XFDU packages that form the identified logical XFDU unit. The sequenceInformation element is a string that acts as an identifier for the logical XFDU. SequenceInformationType has two mandatory attributes: 1. sequencePosition - the position of this XFDU package in the sequence; if 0 is specified and sequenceSize is unknown, it means that it is last in the sequence 2. sequenceSize - the total number of packages in the sequence; if its value is 0 this means size is unknown locator attribute allows finer granularity within location specified in href An element of this type would convey checksum information: The value of the checksum element is the result of the checksum The value of the checksumName attribute is the name of checksum algorithm used to compute the value metadataObjectType Complex Type A generic framework for pointing to/including metadata within a XFDU document, a la Warwick Framework. An metadataObject element may have the following attributes: 1. ID: an XML ID for this element. 2. classification - concrete type of metadata represented by this element of metadataObjectType 3. category - type of metadata class to which this metadata belongs (e.g., DMD.REP, etc.) 4. otherClass - type of metadata in case classification contains value of "OTHER" 5. otherCategory - type of metadata class in case category contains value of "OTHER" An entity of this type is used to indicated CCSDS-bound version of XFDU specification packageHeaderType: Complex Type for metadata about the mapping of the logical packages to the physical structures. The package header type has two elements: -volumeInfo – contains XFDU volume related metadata (.i.e., XFDU specification version and sequence information - environmentInfo – contains application specific information either defined by an extension of the XFDU Schema or by freeform XML. packageHeaderType has a single attribute, ID: an XML ID. Contains XFDU software related system information, including one mandatory element - specificationVersion, which specifies the version of the XFDU specification to which this manifest complies. Additionally it has one optional element -sequenceInformation that holds information about the sequence of XFDUs and the position of the current one in it. Environment info provides meta information related to the environment where the XFDU was created. Since environment information may be specific to a concrete XFDU producer, environment information can have only two optional elements: -xmlData - can hold application specific information. -wild card that serves as extension point for other applications metadataReferenceType: metadata reference. An element of metadataReferenceType is a generic element used throughout the XFDU schema to provide a pointer to metadata which resides outside the XFDU document. metadataReferenceType has the following attributes: 1. ID: an XML ID; 2. locatorType: the type of locator contained in the body of the element; 3. otherLocatorType: a string indicating an alternative type of locator when the locatorType attribute value is set to "OTHER."; 4. href: actual location (e.g., URL) 5. mimeType: the MIME type for the metadata being pointed at; 6. vocabularyName: the name of the well known metadata standard vocabulary used to being pointed at (e.g., FITS); 7. textInfo: a label to display to the viewer of the XFDU document identifying the metadata; and NB: metadataReference is an empty element. The location of the metadata must be recorded in the href attribute. A wrapper to contain arbitrary XML content. fileContentType encapsulates and aggregates a type that can have a choice of either binary or xml data A wrapper to contain Base64 encoded metadata. metadataWrapType: metadata wrapper. An element of metadataWrapType is a generic element used throughout the XFDU schema to allow the encoder to place arbitrary metadata conforming to other standards/schema within a XFDU document. The metadataWrapType can have the following attributes: 1. ID: an XML ID for this element; 2. mimeType: the MIME type for the metadata contained in the element; 3. vocabularyName: the type of metadata contained (e.g., MARC, EAD, etc.); 4. textInfo: a label to display to the viewer of the XFDU document identifying the metadata. The dataObjectPointerType is a type that can be used to reference dataObjects by dataObjectID. The dataObjectPointerType has two attributes: 1. ID: an XML ID for this element; and 2. dataObjectID: an IDREF to a dataObject element keyDerivationType contains the information that was used to derive the encryption key for this dataObject. Key derivation type contains: name - name of algorithm used salt - 16-byte random seed used for that algorithm initialization iterationCount - number of iterations used by the algorithm to derive the key abstractKeyDerivation is declared abstract so that it can be used for element substitution in cases when the default keyDerivation is not sufficient. In order for creating more specific key derivation constructs, one would have to extend from keyDerivationType to a concrete type, and then create an element of that new type. Finally, in an instance of XML governed by this schema, the reference to keyDerivation in an instance of transformObject element would point not to an instance of keyDerivation element, but rather to an instance of the custom element. In other words, keyDerivation would be SUBSTITUTED with a concrete key derivation element. In cases where default functionality is sufficient, the provided defaultKeyDerivation element can be used for the substitution. Default implementation of key derivation type. transformObjectType: transformation information. An element of transformObjectType contains all of the information required to reverse the transformations applied to the original contents of the dataObject. It has two possible subsidiary elements: The algorithm element contains information about the algorithm used to encrypt the data. The key-derivation element contains the information that was used to derive the encryption key for this dataObject It has three attributes: 1. ID: an XML ID 2. transformType: one of n predefined transformations types. Current valid types are compression, encryption, authentication. 3. order: If there are more than one transformation elements in an dataObject this integer indicates the order in which the reversal transformations should be applied. algorithm element contains information about the algorithm used to encrypt the data. byteStreamType: An element of byteStreamType provides access to the current content of dataObjects for a XFDU document. The byteStreamType: has the following four attributes: ID (an XML ID); mimeType: the MIME type for the dataObject; size: the size of the dataObject in bytes. Checksum information provided via optional checksum element. The data contained in these attributes is relevant to final state of the data object after all possible transformations of the original data. dataObjectType: An element of dataObjectType contains current byteStream content and any required data to restore them to the form intended for the original designated community. It has two possible subsidiary elements: The byteStream element provides access to the current content dataObjects for an XFDU document. An element of dataObjectType must contain 1 or many byteStream elements that may contain a fileLocation element, which provides a pointer to a content byteStream, and/or a fileContent element, which wraps an encoded version of the dataObject. An element of dataObjectType may contain one or more transformation elements that contain all of the information required to reverse each transformation applied to the dataObject and return the original binary data object. The dataObjectType has the following attributes: 1. ID: an XML ID 2. mimeType: the MIME type for the dataObject 3. size: the size of the dataObject in bytes 4. checksum: a checksum for dataObject. Checksum information provided via optional checksum element. 5. repID list of representation metadata IDREFs. NB: The size, checksum, and mime type are related to the original data before any transformations occurred. 6. combinationName - specifies how multiple byteStream objects in a single dataObject should be concatenated 7. registrationGroup attribute group that provides registration information dataObjectSectionType: a container for one or more elements of dataObjectType ContentUnit Complex Type The XFDU standard represents a data package structurally as a series of nested content units, that is, as a hierarchy (e.g., a data product, which is composed of datasets, which are composed of time series, which are composed of records). Every content node in the structural map hierarchy may be connected (via subsidiary XFDUPointer or dataObjectPointer elements) to information objects which represent that unit as a portion of the whole package. The contentUnitType is declared as a base type for concrete implementations of contentUnit; The content unit element has the following attributes: 1.ID (an XML ID); 2.order: an numeric string (e.g., 1.1, 1.2.1, 3,) representation of this unit's order among its siblings (e.g., its sequence); order attribute is not meant to be used for processing purposes. It is here only for visualization purposes of the potential reader of XML instance. It is not guaranteed that any software will take value of order attribute into account. contentUnit nesting is the primary means for determining order and level of the content information. 3.textInfo: a string label to describe this contentUnit to an end user viewing the document, as per a table of contents entry 4.repID: a set of IDREFs to representation information sections within this XFDU document applicable to this contentUnit. 5.dmdID: a set of IDREFS to descriptive information sections within this XFDU document applicable to this contentUnit. 6.pdiID: a set of IDREFS to preservation description information sections within this XFDU document applicable to this contentUnit 7.anyMdID: a set of IDREFS to any other metadata sections that do not fit rep,dmd or pdi metadata related to this contentUnit 8.unitType: a type of content unit (e.g., Application Data Unit, Data Description Unit, Software Installation Unit, etc.). 9. behaviorID-an XML ID reference pointing to associate behavior. XFDUPointer:XFDU Pointer. The XFDUPointer element allows a content unit to be associated with a separate XFDU containing the content corresponding with that contentUnit, rather than pointing to one or more internal dataObjects. A typical instance of this would be the case of a thematic data product that collects data products from several instruments observe an event of interest. The content units for each instrument datasets might point to separate XFDUs, rather than having dataObjects and dataObject groups for every dataset encoded in one package. The XFDUPointer element may have the following attributes: 1. ID: an XML ID for this element; 2. locatorType: the type of location contained in the href attribute; 3. otherLocatorType: a string to indicate an alternative locator type if the locatorType attribute itself has a value of "OTHER." NOTE: XFDUPointer is an empty element. The location of the resource pointed to MUST be stored in the href attribute. abstractContentUnit is abstract implementation of contentUnitType. It cannot be instantiated in the instance document. Instead, concrete implementations would have to be used which are declared part of contentUnit substitutionGroup contentUnit is a basic concrete implementation of an abstract contentUnit. Its instance can be used in the instance document in the place where contentUnit declared to be present. informationPackageMapType Complex Type The Information Package Map outlines a hierarchical structure for the original object being encoded, using a series of nested contentUnit elements. An element of informationPackageMapType has the following attributes: 1. ID: an XML ID for the element; 2. packageType: a type for the object. Typical values will be "AIP" for a map which describes a complete AIP obeying all constraints and cardinalities in the OAIS reference model. "SIP" for a map which describes a Submission Information Package. 3. textInfo: a string to describe the informationPackageMap to users. 4. anyAttribute - wild-carded attribute extension point Concrete implementations of abstractContentUnit (contentUnit etc.) must be used in the instance document. interfaceDefinitionType: interface definition object. The interface definition type contains a pointer to an abstract definition of a set of related behaviors. These abstract behaviors can be associated with the content of a XFDU object. The interface definition element will be a pointer to another object (an interface definition object). An interface definition object could be another XFDU object, or some other entity (e.g., a WSDL source). Ideally, an interface definition object should contain metadata that describes a set of behaviors or methods. It may also contain files that describe the intended usage of the behaviors, and possibly files that represent different expressions of the interface definition. interfaceDefinition extends from referenceType and adds ability of specifying inputParameter that can be either just a string value or pointer to the content in this package behaviorObjectType: Complex Type for Behaviors. A behavior object can be used to associate executable behaviors with content in the XFDU object. A behavior object has an interface definition element that represents an abstract definition of the set of behaviors represented by a particular behavior object. An behavior object may have the following attributes: 1. ID: an XML ID for the element 2. structID: IDREF Enables Behavior to point to Content Units or other Manifest types 3. behaviorType: a behavior type identifier for a given set of related behaviors. 4. created: date this behavior object of the XFDU object was created. 5. textInfo: a description of the type of behaviors this object represents. 6. groupID: an identifier that establishes a correspondence between this behavior object and other behavior Behavior object may also include another behavior object for chaining of behaviors. Concrete implementation of mechanism have to be used in the instance document. abstractMechanism is abstract implementation of mechanismType. It cannot be instantiated in the instance document. Instead, concrete implementations would have to be used which are declared part of mechanism substitutionGroup mechanismType: executable mechanism. An element of mechanismType contains a pointer to an executable code module that implements a set of behaviors defined by an interface definition. The mechanism element will be a pointer to another object (a mechanism object). A mechanism object could be another XFDU object, or some other entity (e.g., a WSDL source). A mechanism object should contain executable code, pointers to executable code, or specifications for binding to network services (e.g., web services). mechanismType is declared as base type for concrete implementations of mechanism XFDUType Complex Type. A XFDU document consists of five possible subsidiary sections: packageHeader (XFDU document header), informationPackageMap (content unit section), metadataSection (container for metadata objects), dataObjectSection (data object section),behaviorSection (behavior section). It also has possible attributes: 1. ID (an XML ID); 2. objID: a primary identifier assigned to the original source document; 3. textInfo: a title/text string identifying the document for users; 4. version: version to which this XFDU document conforms