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C.1 Textual analysis in .NET Implement barcode 128 in .NET C.1 Textual analysis

C.1 Textual analysis using barcode development for .net framework control to generate, create code-128c image in .net framework applications. .NET CF The identification of obj USS Code 128 for .NET ect types comes from an analysis of the vocabulary of the problem situation, as expressed in specifications, process manuals and by problem domain experts. A useful way of establishing this vocabulary is by a textual analysis of written problem descriptions.

This technique originated with the work by Russell Abbott [Abbot83], who described a way of identifying program elements, including data types and operations, from English descriptions. The essence of the technique is that nouns and noun phrases imply objects, while verbs and verb phrases imply operations. By drawing up a list of the nouns and noun phrases found in the textual description we can produce a list of potential, or candidate, object types.

This list must then be considered and refined to identify the appropriate and relevant object types. In fact, within a given situation, expressed for a given purpose, problems in doing this seldom arise; it is usually quite clear which kinds of object play an interesting and important part in the situation. This method of coming up with a list of candidate object types has been called the sucker s method because of its simplistic assumption that noun = object.

In fact, this assumption holds in many cases but there are exceptions. It is important to include in the model all those things considered to be separate and interchangeable in the situation; this sometimes includes operations, such as complex parameterised algorithms, as well as more familiar entities. In such cases the operations should become object types.

This follows from an important principle of object-orientation: use objects to encapsulate those things which are most likely to change. 381. Finding the objects C.2 What is a good object When refining a list of c andidate object types, there are some things to watch out for: 1. Be careful that you don t have two or more candidates that really describe the same thing (synonyms). Watch out in particular for adjectives which add little or no meaning.

2. Reject any candidates that describe types which are outside the bounds of the situation being modelled. Ask if the state of this thing changes, is the state of the situation affected 3.

Some candidates might really be the names of properties of objects (e.g. the size of the bottle).

These should be rejected and the type having the property should be annotated appropriately. 4. Some candidates might describe single objects, using their proper names or keys (e.

g. Steve Cook). In this case, decide the type to which the object is conforming, and choose a name for that type: Steve Cook is an object conforming to the type Person.

5. Some noun phrases describe features that objects have only by virtue of their association with other objects (e.g.

the maker of the bottle). Sometimes, this is a pointer to another object type as yet undiscovered (Manufacturer). 6.

Some candidates describe operations on objects, rather than objects themselves. Usually this means that the candidate is not an object type, although if the operation has important properties of its own it might be. Otherwise, consider how to represent the operation as an event.

7. Watch out for mass nouns and units of measure. Use the how much / how many test suggested by Abbott.

He suggests putting the words how much in front of the candidate if it makes sense it is probably not a suitable object type. On the other hand, if putting the words how many in front of the candidate makes sense, it might be a suitable object type. For example: how much water , how many waters .

Water is likely to be a suitable candidate only if the purpose of the model is to compare different samples of water. 8. When building essential models we are not concerned with software or any computer system implementation detail, so discard any candidates which relate to implementation.

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