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### proj3

Course: CSE 462, Fall 2009
School: SUNY Buffalo
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Word Count: 306

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462: CSE Project #3 (due 12/9/05) Problem 1 Suppose you have to represent the information about parts. Each part has a name (unique), and a textual description. Parts may be simple or complex. A simple part has a color but no children subparts. A complex part has a number of children subparts (which can be simple or complex), each of which may be repeated. (E.g., a car has 4 wheels.) A complex part has no color....

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462: CSE Project #3 (due 12/9/05) Problem 1 Suppose you have to represent the information about parts. Each part has a name (unique), and a textual description. Parts may be simple or complex. A simple part has a color but no children subparts. A complex part has a number of children subparts (which can be simple or complex), each of which may be repeated. (E.g., a car has 4 wheels.) A complex part has no color. You can assume that each part can be a child subpart of at most one other part (so each part, together with its subparts, can be viewed as a tree). Do not assume any xed number of levels of part composition. 1. Dene the schema of XML documents containing part information using (a) DTDs, and (b) XML Schema. 2. Give an example of a document instance which is valid under the DTDs and the XML schema above. 3. Write the following queries in XQuery: Q1: (a) nd the names of all the parts that have a yellow part as a child subpart; (b) Q2: nd all the simple parts that belong to at least 3 distinct complex parts; (c) Q3: nd all the parts containing a descendant subpart named sensor and not containing a descendant subpart named switch. 4. Dene a relational schema in which the part information may be represented. Use the interval encoding. Using the relational schema, write the query Q1 in SQL. Extra credit (up to 5% of the nal grade) Assume now that parts ...

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