Schema Comparison Essay

661 words - 3 pages

Schemas are important validation tools which can ensure data is valid and well formed for use. There are different varieties that can be used to verify a document and ensure conformance to standards. Some use a tree hierarchy and others just simple constructs. Lee and Chu (2000) note the following in their paper; DTD, XSD, SOX, Schematron and DSD. Fawcett et al (2012) mention Schematron, DTD, RELAX NG, and XSD. I will discuss some of these in comparison to DTD and XSD which are follow-ons from this week’s Schema discussions.

This Schema type on uses attributes and elements and follows a hierarchy in structure type. It is very simplistic and uses few attribute definitions, and does not follow XML type syntax. However, despite its simplistic nature, it is the most widely used standard according to Lee and Chu (2000).

The true XML Schema Definition is very different from DTD in that it can be very granular in its descriptive elements and ...view middle of the document...

(2012) as well as the need to deal with identification of data in the document help prior to run-time. Although not a widely used as XSD it seems easier to implement and understand, while still improving some of the failings in the DTD model.

Where the previous types of validation used a strict comparison model, the Schematron model uses an appearance directive which is closer in comparison to HTML structuring (Fawcett et al. 2012). Furthermore Schematron allows the author to define quantity, configuration and nature of document rules. However this method is reliant on XSLT to transform the syntax form the document and the rule set and compare them for conformance. This allows for a strong focus on constraints. (Lee and Chu, 2000)

Mentioned lightly by Lee and Chu (2000) this method follows a DTD format with emphasis on an object oriented way. This allows for an extension of the DTD model to include inheritance of elements and increasing the amount of available data types. (Lee and Chu, 2000)

As a model focusing on constraints of elements, this model more closely resembles the Schematron methodology. It uses context dependant descriptions and is akin to XSLT in expressive power, according to Lee and Chu (2000).

These validation models are similar in some of their functionality, but vastly different in either improvement on previous technologies or method of delivery. DTD, SOX are simpler methods of non XML type syntax, in contrast XSD, DSD, RELAX NG and Schematron use XML or XSLT translational elements for setting rules. Schematron seems the least restrictive in directives, where SOX would seem the most restrictive because of the object oriented methodologies. Either choice will allow for the presentation of data that should present in a more compatible manner for other applications use.

Works Cited

Fawcett, J., Quin, L.R.E. & Ayers, D., 2012. Beginning XML. 5th ed. Indianapolis, IN: John Wiley & Sons, Inc.
Lee, D. & Chu, W.W., 2000. Comparative Analysis os Six XML Schema Languages. ACM SIGMOD Record, 29(3), pp.76-87.

Find Another Essay On Schema comparison

Contrasting Relational Understanding and Instrumental Understanding

2059 words - 8 pages subjects being taught. I have considered Skemp’s article in four sections. 1. Faux amis 2. Instrumental and relational understanding 3. The mismatch 4. Implication for mathematics teaching Key terms: Schema; faux amis; Instrumental understanding; relational understanding; mathematics. Setting the Scene It is extremely difficult to define understanding. Skemp attempts to assimilate it into some form of an appropriate or inappropriate schema

UI Content Essay

907 words - 4 pages Domain This section displays the modifications in the state of objects at the domain including all of its controllers. The list contains User, Group, Permissions, Auditing, Computer, Organizational Unit, Container, Schema, etc. The reports are divided into these four categories: Active Directory Modification Reports, Active Directory Security Reports, and Active Directory State Reports. Active Directory Modification Reports This section

The Main Features of Piaget's Theory of Cognitive Development

3066 words - 12 pages this through a process called variant cognitive structures and invariant functions. Variant cognitive structures are divided into two explanations - Schemas and Operations. A schema (schemas/schemata) is an internal representation of some specific physical or mental action which is present in any intellectual or physical act. For example a newborn child has built-in innate schemas that respond to reflex responses ie

Strategy formation and problem solving

2569 words - 10 pages disagreement but by consensus and similarity - by the fact that decision makers share the same cognitive frames of reference and do not realise that they share these cognitive schema." Mabey et. al. (1998, p. 510).Mabey, et. al. (1998), present a dualist view of organisational decision making which, they claim can be described in diametrically opposed dimensions of pluralist, self-serving, politicking and unitarily, group-serving, cognitive schematics. In

Extended Essay

1086 words - 5 pages devoted much more time on school work and felt pressure from their parents to perform higher in their education in comparison to the White American students. On the other hand, more parental contribution in school activities was observed in the White American students. This kind of thrive for academic success is due to cultural teaching, and is instilled in the children’s ideology and framework from a young age. Also, the formation of schema in the

Societal Standards of Feminine Beauty

1115 words - 5 pages Westminster College provides factual evidence that three theories are primarily responsible for the negative mindset of the average American women in comparison to the average model. These theories include: social comparison, cultivation and self-schema. These three theories are indicative of the images seen in reality television, magazines and advertisements. Each perspective has helped researchers examine mechanisms by which the media images


1453 words - 6 pages (Tajfel, Billing, Bundy and Flament; 1971) to explain how identity, as a core schema becomes the root of conflict. Tajfel and Turner later proposed the following steps: Social Categorization (need to label- ‘US’ AND ‘THEM’), Social Identification (identify oneself with the respective group and thereby linking individuals’ self esteem to it), Social comparison (view one’s group in more favorable light than the other group- ‘us versus them’ effect

Gender-Role Identification Theories

1686 words - 7 pages the active role in children in constructing and organising their thoughts (Bem, 1985 in Brannon, L. 2008). Another theory is the gender schema theory which stems through the cognitive developmental theory. The gender schema theory highlights the importance and existence of the cultures that children are brought up in determining their gender schemas and the way children organise and process gender- related information which in return reflects

The Causality and Development of Bulimia

1054 words - 4 pages with bulimia nervosa. In comparison with healthy controls , hospitalized bulimic patients with a history of binge eating more frequently than twice daily had significantly lower CSF concentrations of these brain chemicals. For the total patient group, levels of both chemicals were significantly inversely correlated with binge frequency. This may be due to the fact that low levels of serotonin are related to causing cravings


933 words - 4 pages behaviors (124). The media, according to Macrae, Stangor, and Milne (1994), “primed stereotypes by having subjects [i.e., the media audience] lists traits relevant to stereotype” (as cited in Schneider, 2004, p. 124). Therefore, the author used categories under gender (white male), race (Jewish) and an active schema under (racist). The audio file was the root of the “perceptually degrading words that were related to the stereotype” (124). This primed

The Effects of Advertising on Self Image

2077 words - 8 pages evidence showing the theories behind why media exposure impacts the way a person perceives themselves such as the social comparison theory, cultivation, resonance and the self-schema theory. These all explain why individuals, especially adolescent women internalize the thin ideal. Women have always faced pressure to conform to society’s definition of beauty, but with the prevalence of advertisements on television, magazines, computers and other

Similar Essays

One Schema Fits All? Transdiagnostical Comparison Of Schema Expression And Association Of Schemata To Paranoid Ideation

1165 words - 5 pages reviewed findings and to gain more insight into schema activation in previously uninvestigated groups. Hypothesis on comparison of core schemas across groups From the results above we assume that negative schemata are more pronounced in clinical samples than in healthy controls. High expression of negative self evaluations may reflect a transdiagnostical, unspecific vulnerability factor and should therefore not differ between different clinical groups

Schema Integration Essay

2304 words - 9 pages ]. 12.4.2. Schema Comparison/Matching This step involves identifying and analyzing inter-schema relationships by determining the correspondences between the schemas. Possible conflicts are also detected in this phase. 12.4.3. Schema Conforming In order to integrate schemas, the detected conflicts between them have to be resolved so that it was possible to merge them [81]. It implies modification of one or both schemas that will be

Web Browsing Shortcomings Essay

1794 words - 7 pages operator is designed called schema tightness operator. The schema tightness operator takes as input a web table containing unbound nodes and links and web schema and tightens the web schema of the web table by imposing constraints on the unbound nodes and links in the web table [41]. Comparison Between Relational Algebra and Web Algebra From [42] it is interesting to contrast web algebra with relational algebra. The difference is shown in the

Xml Schema Freind Or Foe Essay

757 words - 4 pages a viable successor to DTD Schemas can provide a wealth of benefits, but are argued by many as overly complex. Is the Schema the best solution for validation or could the DTD be improved in order to provide a simpler, even less verbose way to define XML structure and document validation. Examining the strengths and weaknesses of DTDs can provide the necessary information to further this discussion DTD A Document Type Definition becomes