5.3.1. Language Elements: Conventions
In the following sub chapters describing the template language we used the following conventions:
identifiers in between '<' and '>' must be replaced in the template according to their description
spaces must be used as in the language description
attributes names and values must not contain '"' and tab characters
identifiers that are not in between '<' and '>' are language keywords and must be written as in the language description
any language identifier can be written in between “” character; identifiers containing spaces and must be written in between “”
identifiers enclosed by '[' and ']' characters are not mandatory in the statement
sequences of identifiers separated by '|' character describe a situation where all the identifiers are valid but only one can be used at a time
The template language is composed out of:
statements: they are keywords with a special meaning that define actions taken by template parser; click here for a list of statements
attributes: are keywords describing statement features; they are used to specify statement constraints
operators: are keywords used in specifying constraints (comparison expressions)
Constraints are built in one of the following ways:
comparison expressions: <attribute> <operator> <value>
list of values: <attribute> <value_list>
attributes without type: <attribute>
Attributes may have no type or one of the following types:
integer: signed, 10 digits number
string of characters: may contain any character except '"'
switch: has two values: "on" and "off"
date: year, month, day; where date value is specified it must be written in "yyyy-mm-dd" format
time: hour, minute, second; where time value is specified it must be written in "hh:mm:ss" format
datetime: year, month, day, hour, minute, second; where datetime value is specified it must be written in "yyyy-mm-dd hh:mm:ss" format
topic: list of names defined by the application user used for categorizing articles
Every type has a list of valid operators that can be used on attributes of that certain type. The operators list corresponding to defined types:
integer: <integer_operator> = is | not | greater | greater_equal | smaller | smaller_equal
string of characters: <string_operator> = is | not | greater | greater_equal | smaller | smaller_equal
switch: <switch_operator> = is | not
date: <date_operator> = is | not | greater | greater_equal | smaller | smaller_equal
time: <time_operator> = is | not | greater | greater_equal | smaller | smaller_equal
datetime: <datetime_operator> = is | not | greater | greater_equal | smaller | smaller_equal
topic: <topic_operator> = is | not
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5.3.1. Language Elements: Conventions
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5.3. Template Language Reference