EPScript/Data Types

EPScript

Data Types

Strings and characters

These are contained within either double quotes ("") or single quotes (''). There is no difference between the two, but it may be easier to use one sort when inside an XML attribute. For example:

<when test="type = 'patent'">
...
</when>

Logical Operators

and

Returns true if both the left-hand and the right-hand expressions return true.

<if test="type = 'book' and is_set( creators )">
...
</if>

or

<if test="type = 'book' or type = 'patent'">
...
</if>

not

<if !is_set( creators )">
...
</if>

Comparison Operators

lt

<if test="length(editors) lt 6">
...
</if>

gt

<if test="length(editors) gt 1">
...
</if>

equals

<if test="type = 'patent'">
...
</if>

Control Structures

if

<if test="date_effective">(<print expr="date_effective" opts="res=year" />)</if>

choose/when/otherwise

<choose>
  <when test="title"><print expr="title" /></ep:when>
  <otherwise><print expr="type" /> #<print expr="eprintid" /></otherwise>
</choose>

Procedures

print

Outputs the result of the provided expression attribute as a string. If the result is boolean, TRUE or FALSE will be produced.

<print expr="isbn" />

phrase

Outputs the phrase given in the ref attribute. To provide values for pins in the phrases, the param element is used, with the name attribute giving the pin name and the element content the value to pass.

<phrase ref="my_phrase"><param name="my_pin">Pin Value</param></phrase>