CMS environment variables are the variables created in the process of site document generation. Environment variables are mostly defined at the beginning of the process based on address string parameters (URL). Environment variables contain all the necessary information about the selected document and about the executed interface command.

The meaning of SAPI:EXP expressions is in comparative operations with the CMS environment variables.

Starting at 1.1 version of XML Sapiens specification, environment variables represented as object tree. Root element of this tree is abstract element “project”. It defines interface of entire information area. “Project” objects set unite all site definition objects. Objects’ names correspond to variables, identifying sites or language versions of sites in information area structure. Each of these site objects contains own set of objects. As a result, to get value of configuration record “feedback_email” can be called in the following way:

project.sitea_en.config.feedback_email.value

which is equivalent to

sitea_en.config.feedback_email.value

If this value belongs to current site, syntax simplifies:

config.feedback_email.value

Below site objects collection is listed

Namespace
variable.value	Variable of the site
http_path.value	URL of the site
root_path.value	Absolute address
Navigation
date_start.value	Selection starting date
date_finish.value	Selection finishing date
limit_start.value	Starting element of the selection list
limit_finish.value	Finishing element of the selection list
Address String (URI)
REQUEST_URI.value	Content of REQUEST_URI
argv_string.value	Content of the address string (URI) without navigation part. Supposed, that first part of address string defines document location, and the second part defines specific part of a document. I.e. navigation inside a document is built using this (second) part of address string.
argv[el_index].value	Content of the given address string argument
len_argv.value	Number of address string arguments
last_argv.value	Content of the last address string argument
prev_last_argv.value	Content of the last but one address string argument
argv_nav[el_index].value	Contents of given argument of navigation part of address string
len_argv_nav.value	Count of arguments in navigation part of address string
argv_virtual.year.value	The value of “year” filter in address string
argv_virtual.month.value	The value of “month” filter in address string
argv_virtual.day.value	The value of “day” filter in address string
argv_virtual.id.value	The value of “id” filter in address string
Current Document
document.id.value	Identifier of the current document
document.variable.value	Variable (object name) of the current document
document.title.value	Title of the current document
document.id_parent.value	Identifier of the parent section/document
document.template.value	Identifier of the presentation template
document.flag_children.value	Flag indicating the availability of children for the current document
document.meta_description.value	Document description
document.meta_keywords.value	Document keywords
document.printversion	The variable contains the TRUE value, if the requested document is a document print version.
document.error404	The variable contains the TRUE value, if the requested document is not found.
Path to the Current Document
trackinfo[el_index].href.value	URI of the given path element
trackinfo[el_index].title.value	Title of the given path element
Configuration
config.variable_name.value	Value of the given configuration variable
Other
user.name	Authorized user’s name
user.group[group_name]	Flag which defines current user’s membership in a group
user.role	Authorized user’s role
user.astatus	Authorized user’s status
keywords.value	User retrieval request
timestamp.value	Current time in the TIMESTAMP format
error_message.value	Content of the error message