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How do we use databases?
To use a database, first design a schema to define the structure of your data. Then create tables to store data following the schema. You can then use SQL queries to manipulate and retrieve data from the database. Most databases also provide tools or APIs to interact with them programmatically.
What is the difference between XML and SQL data storage?
In XML data storage, the data is stored in a file which represents an XML Schema of the data. To read the data, you have to pull and open the entire file in memory and use technics like xpath to get the data element you want. In SQL data storage, the data is stored in a database ( usually relational database). To read the data, you simple sent an SQL query to the database. The database management engine analysis the query and get the required data elements you ask for in your query which is finally sent to you as a reply.
Difference between user and schema for DB2?
In DB2, a user is an individual who is granted permissions to access and interact with the database, while a schema is a named collection of tables, views, procedures, and other database objects owned by a user. Users are associated with schemas to define their default schema for objects they create.
Are People likely to remember only information consistent with their schema?
People are more likely to remember information that is consistent with their existing schema because it fits into their established mental framework. However, information that challenges or contradicts their schema may also be memorable due to its novelty or cognitive dissonance. Overall, memory is influenced by a combination of schema consistency and personal relevance.
2.5 What is the difference between logical data independence and physical data independence?
The logical data independence is the ability to modify a logical schema without making external view or application program change. The physical data independence is the ability to modify a physical schema without making external view or application prrogram change.
How is XML validated?
An xml is normally validated against an xml schema, the schema is the rulebook that defines what can and connot be included in your xml file. You can also use xml validation software which will check and validate your xml, that sit is correct in terms of syntax etc and then check it agianst yuour schema.
What is xml schema?
XML Schema is an XML-based alternative to DTD.An XML schema describes the structure of an XML document.The XML Schema language is also referred to as XML Schema Definition (XSD).An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself.
What is an xml schema give sample code?
an xml schema is a blueprint for validating an xml file, you can see sample schema code in the tutorial in the link below.
Why xsd is used in xml schema?
An xsd is used in an xml schema as a blueprint to define what can and cannot be included in an xml file.
What exactly is the XML schema?
An XML schema is a certain type of XML document. It is expressed in constraints, on top of the normal XML constraints, on the structure and content of documents of that type.
How many XML Schema languages exist?
Currently, twelve different XML Schema languages exist. All twelve languages are used exclusively in XML Schema, which is a special kind of XML document. XML documents are documents formatted in a way that allows both humans and machines to understand easily.
What are the xml tools?
That depends on what you want to do, xml tools include; xml parsers xml validators xml editors xml schema editors xml code generators
Are schemas and DTDs both written themselves in XML?
An xml schema is written using the syntax and specifications of xml.
What is the difference between a well formed XML document and a Valid XML document?
Well-formed XML means that the XML is correct (it has only one root node, and all elements match an end element tag)Valid XML means that the XML can be validated to an XML Schema or DTD, and that all the tags in the XML are also in the Schema or DTD, and in the right place.
Explain the use of XML schema in the web designing application?
XML Schemas ensure that data can be communicated in a format that is universal. For example, different countries use different formats to display the date. Some countries put the month first, others put the day first, and some put the year first. The XML Schema for date requires that all dates be in YYYY-MM-DD format. Thus, everyone viewing XML data knows what the data is because they know it is written in XML Schema. XML Schema has a lot of built-in data types for defining data. To define data, XML Schema uses attributes. XML Schema attributes are somewhat similar to HTML attributes in that they are included within a tag, and the attribute further defines the tag. With HTML, an image tag would have a source attribute to provide the name of the file that contains the image to be displayed. Another example of an HTML attribute would be an alignment attribute within a paragraph tag that stipulates whether the paragraph should be aligned to the left or right. Examples of XML Schema attributes for describing data are string, decimal, boolean, integer, date, and time. One of the most important features of XML Schema is that it is replete with many different built-in restrictions that can be imposed on all data so that data is consistently displayed a certain way or presented in a certain format. Using XML Schema restrictions, a programmer can impose limits on upper or lower bounds for ranges of numbers, the length of numbers or the length of lists of items, and XML Schemas can even be used to define how white space is handled (tabs, line feeds, etc.).
What are XML schemas?
an xml schema is a blueprint for your xml file and it dictates what can and cannot be in your xml file. it also is a blueprint as i said and so it outlines the tsructure of your file, the nodes, elements, child, attributes etc
What is PDP file extension?
A PDP file is a XSD(Xml schema definition) format file.
