49 lines
1.6 KiB
Markdown
49 lines
1.6 KiB
Markdown
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## General intro
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### XML :
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Extensible Markup Language and related technologies.
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Similar to HTML with some changes to better suit general data
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Rich and expressive but more complex than JSON.
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### JSON :
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Javascript object notation.
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Very concise format for serializing object data
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Derived from JavaScript but supported by most modern languages
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Compact and easy to read, write, and process.
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## Specific info.
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### XML :
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Similar to structure to HTML but more strict.
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Usually used for complex, document-like data.
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Must always have a single root tag.
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Can contain optional document declaraton
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Empty tags must have a closing slash <tag/>
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Attributes must have values that are enclosed in quotes.
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Tags must be properly nested within each other.
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Tags and attributes starting with "xml" are reserved.
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### JSON :
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Lightweight, text-based format for data interchange
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Easy for humans to read and machines to use.
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Derived from JavaScript, but language independent.
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- Number : Signed decimal number, no Integrer/Float distinction
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- String : Unicode or escaped characters inside double quotes.
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- Boolean : True or false value
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- Null : Null value
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- Array : List of ordered values
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- Object : Collection of key-value pairs, keys are strings
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### Sending data to web services
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HTTP Operation | Purpose
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GET | Retrive data from a web service
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POST | Create or update data on a web service
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PUT | Create or update specific data resource on a web service
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PATCH | Perform a partial data update or edit on a web service
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DELETE | Delete data on a web service
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