L6 - Technology Perspective of Information-oriented System Integration Flashcards
What is IoSI?
IoSI (Information-oriented System Integration) involves data exchange between source and target systems (applications).
What are the three main requirements for IoSI?
Represent data in a canonical (approved) format.
Maintain data using metadata.
Facilitate real-time integration.
What are three solutions for IoSI?
Data warehousing
Data federation
Data replication
What is the purpose of XML?
XML is used for storing and transporting data in a structured, hierarchical format.
How does XML differ from HTML?
XML carries data, whereas HTML renders data.
XML is not predefined, while HTML uses predefined tags.
What are some key characteristics of XML?
Both human and machine-readable.
Encapsulates data and metadata.
Used in IS, IT, Data Science, etc.
Independent of presentation.
What is XML DOM?
XML Document Object Model (DOM) represents XML documents as hierarchical trees.
What is an example of an XML document?
(bookstore)
<bookstore>
<book>
<title>Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
</bookstore>
What is an XML namespace?
XML namespaces uniquely identify elements and attributes to prevent conflicts in different contexts.
What are the key differences between XML and HTML?
Purpose: XML stores data, while HTML formats/display content.
Extensibility: XML allows custom tags, HTML has fixed tags.
Syntax Rules: XML requires closing tags and is case-sensitive, while HTML is more lenient.
What are five special characters in XML and their escape codes?
& → &
“ → "
‘ → '
< → <
> → >
What is an XML Schema?
XML Schema (XSD) defines the structure and constraints of an XML document.
What are the three types of XSD Schema data types?
Primitive/Built-in types (e.g., xs:string, xs:boolean).
Derived types (e.g., xs:integer, xs:positiveInteger).
User-defined types (e.g., xs:complexType).
What is the purpose of XML in data exchange?
XML ensures structured data sharing between different systems by using schemas and metadata.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based format for storing and transferring data.
What are the key features of JSON?
Uses key-value pairs
Objects enclosed in {}
Arrays enclosed in []
Lightweight and faster than XML
How does JSON compare to XML?
Schema: XML has robust schema validation; JSON has limited schema validation.
Attributes: XML supports attributes;
JSON uses key-value pairs.
Security: XML supports WS-Security, whereas JSON relies on external security layers.
What is Linked Data?
Linked Data interconnects data on the Web, similar to how web pages use hyperlinks.
What are the four principles of Linked Data?
Use URIs as names for things.
Use HTTP URIs.
Present useful information when
URIs are looked up.
Include links to related data.
What is RDF (Resource Description Framework)?
RDF describes resources using subject-predicate-object triples, forming a graph of linked data.
