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Benjamin needs your help with a document that lists some of Map Finds For You’s map products. The document contains a root element named products with one or more occurrences of the product element containing information on map products. The product element contains five child elements— name , versionDate , desc , an optional isbn , and price . The name element stores the name of the product and supports two attributes— pid , the ID number of the product; and category , the type of product ( historical , state , or parks ).

The versionDate element also supports an optional surveyDate attribute that indicates the date of the map survey, if known. The desc element stores a description of the product. The optional isbn element stores the ISBN for the product. The price element stores the name of the product and supports two attributes— format , the format of the product ( flat or raised ) with a default of flat ; and media , the media type of the product ( paper or electronic ). Therefore, your task will be to create the DTD for the document.

Complete the following: 1. Using your text editor, open the prodtxt.xml file, enter your name and today’s date in the comment section of the file, and then save the file as products.xml . 2. In the products.xml file, insert an internal DTD for the root element products directly after the comment section and before the opening tag. 3. Within the internal DTD, declare the following items: a. The products element, containing at least one occurrence of the child element product b. The product element, containing five child elements in the sequence name , versionDate , desc , an optional isbn , and price c. The name , versionDate , desc , isbn , and price elements, each containing parsed character data 4. Add the following attribute declarations to the product element: a. For the name element, a required pid attribute as an ID b. For the name element, a required category attribute equal to historical , state , or parks c. For the versionDate element, an optional surveyDate attribute containing the date of the survey d. For the price element, an optional format attribute equal to either flat or raised , with a default of flat e. For the price element, a required media attribute equal to either paper or electronic 5. On the same line as the format attribute definition, insert a comment containing the text format default is flat . 6. Save your changes to the products.xml file, and then use Exchanger XML Editor or another XML tool to verify that the document is well formed. 7. Validate the document. If necessary, correct errors one at a time and revalidate until the document is valid.

Paper For Above instruction

Creating a well-structured XML document for Map Finds For You's map products requires careful planning of the Document Type Definition (DTD) to ensure proper validation and organization of data. This process involves defining the structure, elements, and attributes that will accurately represent the map products, facilitating data integrity and adherence to specified requirements.

Firstly, the essential elements such as products, product, name, versionDate, desc, isbn, and price must be clearly defined within the DTD. The hierarchical arrangement mandates that the products element encompasses multiple product elements, each representing individual map products. Each product element must include five specific child elements arranged in a defined sequence: name, versionDate, desc, an optional isbn, and price. This sequence ensures consistency across all product entries and aligns with the data structure outlined in the assignment instructions.

The attributes assigned to these elements play a key role in adding metadata and ensuring uniqueness. The name element, for example, requires a pid attribute serving as a primary identifier (ID) for the product, and a category attribute constrained to specific values—historical, state, or parks—representing the product's category. The versionDate element supports an optional surveyDate attribute, which captures when the map survey was conducted, enhancing the data's context.

The price element includes two attributes. The format attribute, which indicates whether the map is flat or raised, is optional with a default value of flat. This is explicitly documented with an inline comment stating, "format default is flat," to clarify the default setting for users editing the XML. The media attribute, which describes the media type such as paper or electronic, is mandatory, ensuring clarity about the format of the map product.

After establishing the DTD, the implementation involves editing a sample XML file—products.xml—by inserting the DTD immediately after the comment section. It is crucial to verify that the XML document is both well-formed and valid, which can be accomplished using XML editors like Exchanger XML Editor or similar tools. By doing so, one ensures the data structure conforms precisely to the specified DTD, enabling effective data management and retrieval in applications relying on this XML structure.

In conclusion, designing an internal DTD for the Map Finds For You map products involves defining the correct element hierarchy, sequence, and attributes with appropriate constraints and default values. This meticulous structuring guarantees that the XML document maintains its integrity and adheres to the defined schema, thereby supporting efficient data handling and validation processes.

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