Podcast
Questions and Answers
Which statement about XML schemas is FALSE?
Which statement about XML schemas is FALSE?
- A schema is a more precise way to define the content of an XML document.
- An !ATTLIST describes an XML attribute in the DTD.
- XML schemas become the metadata. (correct)
- A document type definition is used to determine if the XML document content is valid.
What is the purpose of a document type definition in XML?
What is the purpose of a document type definition in XML?
- To define XML schemas
- To store data in a pure text format
- To determine if the XML document content is valid (correct)
- To describe XML attributes in the DTD
What is the advantage of using XML to define data?
What is the advantage of using XML to define data?
- Data are not stored in a pure text format
- Data are dependent on proprietary software
- Data are stored in a proprietary software format
- Data are stored in a pure text format and not dependent on any proprietary software (correct)
Which statement about mainframe computer formats is TRUE?
Which statement about mainframe computer formats is TRUE?
"In the XML context, what is a schema used for?"
"In the XML context, what is a schema used for?"
"What does a data dictionary typically contain?"
"What does a data dictionary typically contain?"
What are braces { } commonly used to indicate in the context of XML attributes in DTD?
What are braces { } commonly used to indicate in the context of XML attributes in DTD?
Which of the following is an advantage of using XML for data management?
Which of the following is an advantage of using XML for data management?
In the context of XML, what is included in a physical data structure?
In the context of XML, what is included in a physical data structure?
What is a synonym or other name for an element known as in XML and metadata terminology?
What is a synonym or other name for an element known as in XML and metadata terminology?
In the context of XML, what does a base element refer to?
In the context of XML, what does a base element refer to?
What is a derived element in XML and metadata terminology?
What is a derived element in XML and metadata terminology?
What does the symbol X(8) represent in XML attributes?
What does the symbol X(8) represent in XML attributes?
In the context of XML, what does a varchar data type represent?
In the context of XML, what does a varchar data type represent?
When it comes to a default value on a GUI screen, what interface elements may it be used for?
When it comes to a default value on a GUI screen, what interface elements may it be used for?
What is the main purpose of data stores in XML usage?
What is the main purpose of data stores in XML usage?
Why is it important to keep the value for the length small when working with XML?
Why is it important to keep the value for the length small when working with XML?
Flashcards are hidden until you start studying
Study Notes
XML and Schemas
- In XML, schemas do not become the metadata.
- A document type definition (DTD) is used to determine if the XML document content is valid.
- An
!ATTLISTdescribes an XML attribute in the DTD. - A schema is a more precise way to define the content of an XML document.
- XML is beneficial as it stores data in a pure text format, independent of proprietary software.
Data Format
- There are three standard formats for mainframe computers: zoned decimal, packed decimal, and binary.
- Zoned decimal is not used to determine whether the XML document content is valid.
- Packed decimal format is commonly used to save space on file layouts and for elements that require a high level of arithmetic.
Data Dictionary and Metadata
- A data dictionary defines the terms used to describe the data elements.
- Metadata refers to the information about the data elements.
Data Structure
- Physical data structure includes codes that identify the status of a master record.
- Braces
{ }are used to indicate iteration. - A synonym or other name for an element is called an alias.
- A base element is one that was initially keyed into the system.
- A derived element is one that is created by processes as a result of calculations or a series of decision-making statements.
Data Elements
- When determining the length for elements, figure the amount of a numeric element and add a few characters for reasonable expansion.
- The symbol X(8) represents eight alphanumeric characters.
- A varchar data type is used to represent data that can contain any number of characters (up to the database limit).
- A default value on a GUI screen may be used for drop-down lists, radio buttons, and check boxes.
- Data stores are used to store all base elements and some derived elements.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
