Additionally, a set of broad examples and use cases can help to clarify the specification’s scope. If not already done , group the products into generic categories – these are the classes of products (e.g., content, user agent, protocol, API, specification). Editors and authors are busy, under pressure to get the specification published, and already have a reading list of W3C documents. This document can be used as a checklist of things to consider, a how-to guide with examples and techniques that can be adapted, and a reference for understanding conformance concepts and terminology. Editors may have less rework and thus, fewer issues raised during the development of the specification, and fewer errata once it is finished.
However, the transformation tools support symbolic reasoning, which may be used to explore the meaning of a specification at a much higher level of abstraction. Using random-effects specifications does not change the results significantly. In today’s announcement, BMW says it’s working with Apple and the Car Connectivity Consortium to build UWB support into version 3.0 of the Digital Key specification. So, when deciding on tent stakes in terms of weight, weigh the pros and cons of the stake as a whole instead of basing it on one technical specification. The following references have been inspirational to the ideas captured in this document.
- It is difficult to understand some concepts, behaviors, functionality, or other aspects of a specification without informative interpretations to aid the reader.
- Increase misinterpretation or cause conflict of requirements due to multiple or duplicated requirements.
- The W3C internationalization home page is a good place to start.
- This document can be used as a checklist of things to consider, a how-to guide with examples and techniques that can be adapted, and a reference for understanding conformance concepts and terminology.
Think about the implications of both implementing the optional feature and of not implementing it. Do not make something an option just because the Working Group cannot decide on what to do or cannot reach consensus. As the specification progresses, consider removing unimplemented features. Creating subdivisions can get complicated, not just for the specification editors but also for implementers who have to choose from the set of subdivisions. Subdividing the technology affects and can complicate conformance with all the various combination of choices it provides. Thinking about the various possibilities helps to structure the conformance model, taking into account how the subdivision can affect various classes of products.
It helps reviewers determine when the specification is over-stepping its mandate and offers the possibility for revising the specification while it is in development. It also helps readers know the limits or boundaries of the specification and whether it is of interest to them. XHTML 1.0 uses the words of RFC2119 but in an extended way (See Definitions ).
Aside from the parts necessary to make a computer, types of specifications also include any directions or methods needed for successful production, such as tools or machines that are used in the manufacturing process. Web services specifications are often under the umbrella of a quality management system. For example, Mac OS X has many components that prefer or require only decomposed characters (thus decomposed-only Unicode encoded with UTF-8 is also known as “UTF8-MAC”). In one specific instance, the combination of OS X errors handling composed characters, and the samba file- and printer-sharing software , has led to confusing and data-destroying interoperability problems. In engineering, manufacturing, and business, it is vital for suppliers, purchasers, and users of materials, products, or services to understand and agree upon all requirements.
Other Word Forms of Specification
XQuery Formal Semantics [XQUERY-SEMANTICS] section 1.1 defines where the document is normative over the grammar specs and where the grammar specs are normative. For instance, HTTP 1.1 defines two types of conformance, one where all the MUST are respected, and one where all the MUST and the SHOULD are implemented. It is important for readers to be able to differentiate requirements in the specification from non-requirements in order to either implement or review them.
To design a specification, you must capture all of the technical details and performance specifications of a product. There’s often many formats professionals design specification in, leading to difficulty in processing and analyzing data. Specright’s patented Specification Management platform offers hundreds of specification templates to ensure your supply chain is on the same page. UK project specification types fall into two main categories prescriptive and performance. Prescriptive specifications define the requirements using generic or proprietary descriptions of what is required, whereas performance specifications focus on the outcomes rather than the characteristics of the components.
This enhances the functionality and interoperability of the Web. When writing a specification, it is important to keep in mind who will be using the document. For example, if you are writing a specification for a software application, you will need to include information about the operating system and hardware requirements. If you are writing a specification for a manufacturing process, you will need to include information about materials, tolerances, and other factors. Specification in business refers to a document that spells out the specific requirements for a product, service, system or component. The purpose of a specification is to ensure that what is delivered meets the needs of the customer or user.
That helps the Working Group identify missing pieces, spelling mistakes, ambiguities and dependencies. When a well-defined review process is established inside the Working Group, reviews during the editing phase are easy to accomplish. Define an internal process for reviewing and developing new parts of the specifications, and how they appear in W3C technical reports.
From a user point of view, a deprecated feature is one that should not be used anymore, since it may be removed from future versions of the specification. Deprecated features are no longer recommended for use and may become obsolete and no longer defined in future versions of the specification. Examine the reason for the optional feature – does it address a real, existing need? Should it really be optional or should it be made a mandatory part of the specification? Be careful not to provide optional features in anticipation of something that sounds like a good idea but whose implementation is improbable – ask the implementers if they ever plan to need this.
The different types of specification
The XSLT 1.0 specification allows a processor to recover from some of the defined errors. For each class of products affected by an error condition, address error handling. For instance, for a language, address what effect an error in the input has on a processor of this language. For a protocol, address how a party to this protocol should behave when a bogus message is received. HTML 4.01 defines the behavior of user agents with regard to invalid documents (see section B.1 ). Indicate whether extensions apply to a specification’s profiles or modules and not to the core part of the specification.
The ICS might be an external document, or the specification may link to a precise dated document, etc. Organize the features according to the subdivisions of the specification or in the order they occur in the specification or in some other logical grouping. Specification Guidelines section 4.4 Conformance Claims provides this document’s template for conformance claims. Rather than live with the infinite varieties of creative conformance claims that can arise in a vacuum, the specification can be proactive.
Origin of Specification
Very often, this kind of specifications is complemented by a designated template. A design or product specification describes the features of the solutions for the Requirement Specification, referring to either a designed solution or final produced solution. Sometimes the term specification is here used in connection with a data sheet , which may be confusing. A data sheet describes the technical characteristics of an item or product, often published by a manufacturer to help people choose or use the products. A data sheet is not a technical specification in the sense of informing how to produce.
A formal specification is a mathematical description of software or hardware that may be used to develop an implementation. It describes what the system should do, not how the system should do it. Given such a specification, it is possible to use formal verification techniques to demonstrate that a candidate system design is correct with respect to that specification. This has the advantage that incorrect candidate system designs can be revised before a major investment has been made in actually implementing the design. An alternative approach is to use provably correct refinement steps to transform a specification into a design, and ultimately into an actual implementation, that is correct by construction.
Many contexts use conformance claims, including legal as part of regulations, laws, or policies and commercial when selling or buying a product. Specify in the conformance clause how to distinguish normative from informative content. This document is useful as a standalone document or as part of a family of QA Framework documents designed to help the Working Groups improve all aspects of their quality practices. Make sure that all stakeholders involved in the project understand what is expected of them, and what the specifications are. It is also important to be as specific as possible when writing a specification. This will help to ensure that there is no ambiguity about what is required.
Whether to raise an error when attempting to create an attribute directly under the root of a result tree fragment. Whether to raise an error when two attribute-sets of the same precedence contain an attribute of the same name. Whether to raise an error when the content of an attribute is not plain text. Whether to raise an error when attempting to create an attribute on a node that is not an element. Whether to raise an error when attempting to create an attribute after having created children of the element.
In fact, claiming conformance to a technology may be required in certain situations. Thus, it is important to provide a consistent and unambiguous way to make these claims. Identification of the specification version, class of products, and conformance label are some of the items that could be part of such wording.
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In other cases, the customer may have very specific and unrealistic demands. A detailed description of requirements, materials, etc., as in a plan for a building. Specificationmeans and include the specifications as detailed in the attached herewith and Drawings attached thereto as well as samples and patterns, . According to The GBGB, roughly a quarter of the dogs were given new homes and 60 percent were taken into a greyhound charity.
Reusing existing terms reduces the cost of creating new definitions and makes it easier for readers already familiar with other specifications to get into the new one. In addition, conflicting definitions for the same term lead to reduced interoperability. English is ambiguous, such that a term’s interpretation is context dependent. When using a specific feature of another specification, use the precise designation, wording of the feature and a unique and precise way to identify this feature in the specification . Describe the technology features through numerous examples and complement them by references to the normative texts. Scope is one of the first sections a reader reads, so it is important to capture their attention and make sure they understand what the specification is about.
Use the template to create the conformance clause.Simply complete the conformance clause template and put the result into the specification. The conformance clause of this document describes the conformance requirements for claiming conformance to this Specification Guidelines. A specification editor who wishes to write a specification conformant to Specification Guidelines must ensure it satisfies the conformance requirements in the conformance section of this document. It has been reviewed by W3C Members and other interested parties and has been endorsed by the Director. It is a stable document and may be used as reference material or cited as a normative reference from another document. W3C’s role in making the Recommendation is to draw attention to the specification and to promote its widespread deployment.
The HTML 4.01 specification has a full list of elements and attributes. Each element and attribute has a link to its definition in the specification. For each deprecated feature, create a link to the appropriate definition in the previous specification. For instance, a specification may require that an implementation supports both the features of the new and the old specifications, or it may suggest a conversion mechanism. For each deprecated feature, create a link to the appropriate definition in the specification. In XSLT 1.0 , extension attributes can be present on the official XSLT elements, but they are prohibited from changing the specified behavior within the detectability of conforming behavior.
For example, each participant can check a different part of the specification. In 2004, QA Working Group documents entered Candidate Recommendation prior to a thorough quality review, resulting in a huge number of issues to resolve and an eventual retreat back to Working Draft for major revisions. Identifying obsolete features gives a clear message to users and implementers that those obsolete features are forbidden and not part of the specification anymore. This helps to avoid the creation of documents that mix the old and new techniques and that would be invalid. Consider the effect of deprecation on all classes of products that implement the specification (e.g., authoring tools, converters, and user agents). Discuss the implications of either using the optional feature or not.
An initial dash or underscore is guaranteed never to be used in a property or keyword by any current or future level of CSS. Thus typical CSS implementations may not recognize such properties and may ignore them according to the rules http://rulfdesign.ru/cyprus/realty.html for handling parsing errors. However, because the initial dash or underscore is part of the grammar, CSS2.1 implementers should always be able to use a CSS-conforming parser, whether or not they support any vendor-specific extensions.