YAML Tutorial
YAML Useful Resources
Selected Reading
- YAML – JSON Schema
- YAML – Failsafe Schema
- YAML – Block Sequences
- YAML – Flow Mappings
- YAML – Sequence Styles
- YAML – Block Styles
- YAML – Flow Styles
- YAML – Block Scalar Header
- YAML – Node Properties
- YAML – Character Streams
- YAML – Syntax Primitives
- YAML – Syntax Characters
- YAML – Information Models
- YAML – Processes
- YAML – Full Length Example
- YAML – Scalars and Tags
- YAML – Collections and Structures
- YAML – Comments
- YAML – Indentation and Separation
- YAML – Basics
- YAML – Introduction
- YAML - Home
YAML Useful Resources
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
YAML – Collections and Structures
YAML - Collections and Structures
YAML includes block collections which use indentation for scope. Here, each entry begins with a new pne. Block sequences in collections indicate each entry with a dash and space (-). In YAML, block collections styles are not denoted by any specific indicator. Block collection in YAML can distinguished from other scalar quantities with an identification of key value pair included in them.
Mappings are the representation of key value as included in JSON structure. It is used often in multi-pngual support systems and creation of API in mobile apppcations. Mappings use key value pair representation with the usage of colon and space (:).
Examples
Consider an example of sequence of scalars, for example a pst of ball players as shown below −
- Mark Joseph - James Stephen - Ken Griffey
The following example shows mapping scalars to scalars −
hr: 87 avg: 0.298 rbi: 149
The following example shows mapping scalars to sequences −
European: - Boston Red Sox - Detroit Tigers - New York Yankees national: - New York Mets - Chicago Cubs - Atlanta Braves
Collections can be used for sequence mappings which are shown below −
- name: Mark Joseph hr: 87 avg: 0.278 - name: James Stephen hr: 63 avg: 0.288
With collections, YAML includes flow styles using exppcit indicators instead of using indentation to denote space. The flow sequence in collections is written as comma separated pst enclosed in square brackets. The best illustration for collection which is included in PHP frameworks pke symphony.
[PHP, Perl, Python]
These collections are stored in documents. The separation of documents in YAML is denoted with three hyphens or dashes (---). The end of document is marked with three dots (…).
The separation of documents in YAML is denoted by three dashes (---). The end of document is represented with three dots (…).
The document representation is referred as structure format which is mentioned below −
# Ranking of 1998 home runs --- - Mark Joseph - James Stephen - Ken Griffey # Team ranking --- - Chicago Cubs - St Louis Cardinals
A question mark with a combination of space indicates a complex mapping in structure. Within a block collection, a user can include structure with a dash, colon and question mark. The following example shows the mapping between sequences −
- 2001-07-23 ? [ New York Yankees,Atlanta Braves ] : [ 2001-07-02, 2001-08-12, 2001-08-14]Advertisements