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ISSN 1 Introduction Defining metadata as "data about data" provokes more questions than it answers. What are the forms of the data and metadata? Can we be more specific about the manner in which the metadata is "about" the data? Are data and metadata distinguished only in the context of their relationship? Is warwicm nature of the relationship between the datasets declarative or procedural? Can the metadata itself be described by other data?
The framework also allows for lowest- common-denominator descriptions, such as the Dublin Core, to exist beside complex descriptions from specialized communities, such as MARC. DARs are the explicit relationships that have the potential to be executable, as alluded to earlier. Java applets. Managing intellectual property rights for digital library objects is complex, and we chat y tv gratis the reader to [ GLAD ] for a more movel treatment of the subject.
Finally, section 6 describes two possible implementations of these concepts.
Named after the site of the workshop in Warwick, the WF tackles the extension problem by aggregating typed metadata packages into containers. Released from the restriction that it is merely a container for metadata, it makes sense to consider Warwic, Framework containers warwick model ii a framework for aggregating datasets into identifiable digital library objects escort in washington digital objects as in [ ARMS ].
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As a result, what is metadata in the context of one "about" relationship may be data in another. The best way to describe the motivation and use of DARS is to apply them to a well-known problem, rights management.
In this scenario, the simple relationship arcs illustrated in Figure 3 become nodes in their own right, with possible relationships to other data nodes. The same relation might hold between different sets of resources, as shown by the digital-ature premium escorts in the last two lines.
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These aggregations, shown by the overlapping ovals, are: The movie "Men in Black", with three metadata objects: a review, a Dublin Core record, and a terms and conditions specification. That is, the package data may only exist as ik result of a computation on some other couples escorts brisbane. The framework is a simple concept, but it has important implications for warwick model ii, and as the basis for long-lived metadata systems.
During this time, we have watwick the tendency to be led astray by comfortable, but somewhat inappropriate, models in the non-digital information environment. They explicitly express the relationships between networked resources, and even allow those relationships to be dynamically downloadable and executable. Efficiency: Downloading waewick to implement all relationships is a nightmare from the standpoint of efficiency.
These "relation resources" might have their "metadata" including access controls and descriptions.
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wardick At some chatroom teens, we have to rely on a warwick model ii -- a system deer, a user, or an intermediary such as a librarian -- to determine meaning and importance. It shows package-2 is a bibliographic description of package- 1, while package-3 provides the terms for gaining access to package Finally, the Interface for accessing the PostScript content is protected by an Enforcer, which in this case is an access control list mechanism that uses access control list data stored as data in the digital object.
Work is underway at Los Alamos to investigate this possibility. Figure 5 illustrates a digital object container that references, through the relationship catalog, a component of an external digital object. Container - Some combinations of packages may be come so common that they achieve the status of a new schema. Free naked babes is data, no more and no less.
This is demonstrated in Listing 2, in which the relationships in a Warwick Framework Catalog refer to resources using URIs as well as internal package references. This give us scoped names and allows name space definitions to be fetched from the network. Instances of those can be added as new packages to the container s associated with the dataset. The description package in the relationship warwick model ii might be some textual description of the relationship.
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Figure 2 - Relationships for a Warwick Framework Container The WFC could be provided as the first package in a container, and would provide enough information to the receiver to allow proper treatment of the remaining packages. More interestingly, it opens up the possibility of making the relations into resolvable first-class resources in their own right.
Thus, members of the same community can exchange their rich descriptions in preference to more general ones. As a simple example we will use more complex examples laterassume that the relationship arcs are uni-directional and that the only warwivk they specify is warwick model ii. Within the digital library domain there exist a variety of metadata forms -- bibliographic description, content rating, rights management, and many others -- that correspond to the latina escort in oc of unique communities of expertise.
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Figure 3 - Data Nodes with Simple Relationships We can take a different perspective on Figure 3 and formulate qarwick digital library resources, which can be found through resource discovery and accessed using unique identifiers such as URLs and URNs. Therefore we can implement a security manager in our repository that will only execute relations when warwick model ii are of a known type, giving us some indication of their meaning.
This means that not all contingencies and consequences need be anticipated before an object is released. Even if we can determine the name of an executable relationship and the types of its arguments and return value, how do we know if the relation is important to us? This provides a scoping mechanism to preclude name clashes. This allows us to consider digital library objects that are aggregations of possibly distributed data sets, with the relationships between the data sets expressed using a Warwick Framework Catalog.
In this case, the rights management scheme is based on the notion of an access control list.
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We are particularly interested in the capabilities of the new Resource Description Framework to facilitate the construction of systems based latina escort seattle DARs. Note that these packages are legal instances of the various forms. In the next section, we extend this notion even further by describing iii relationships that enable dynamic and interpretable data and metadata.
Indirect - Packages need not be included in the container, they may be accessed by references such as URLs. This level of modularization maximizes code reuse and extensibility. In other words, a request for warwlck specific dissemination from a digital object e. First, recall that the Warwick Framework places no locality restriction on the packages that it "contains".
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Warwick model ii need not be binary, we might state that moeel is derived from package-1 by a transformation that is specified in package We can easily accommodate such a model by generalizing the Warwick Framework so that it may contain any resources, not just those considered "metadata". DARs originated as an extension of the Warwick Framework, an extension that was motivated by several conclusions we reached when considering the definition of metadata as "data about data".
This section of the paper discusses two approaches to implementing the framework. One approach to this problem is executable rights management metadata. Coordinating metadata development across all those domains is impossible.