set_variable

Property Manager name: Set Variable
Behavior version: The v2025-01-13 rule format supports the set_variable behavior v1.7.
Rule format status: GA, stable
Access: Read/Write
Allowed in includes: Yes

Modify a variable to insert into subsequent fields within the rule tree. Use this behavior to specify the predeclared variable_name and determine from where to derive its new value. Based on this value_source, you can either generate the value, extract it from some part of the incoming request, assign it from another variable (including a set of built-in system variables), or directly specify its text. Optionally choose a transform function to modify the value once. See Support for variables for more information.

Option	Type	Description	Requires
`variable_name`	string (variable name)	Specifies the predeclared root name of the variable to modify. When you declare a variable name such as `VAR`, its name is preprended with `PMUSER_` and accessible in a `user` namespace, so that you invoke it in subsequent text fields within the rule tree as `{{user.PMUSER_VAR}}`. In deployed XML metadata, it appears as `%(PMUSER_VAR)`.		{"displayType":"string","tag":"input","type":"text"}
`value_source`	enum	Determines how you want to set the value.		{"displayType":"enum","options":["EXPRESSION","EXTRACT","GENERATE"],"tag":"select"}
	`EXPRESSION`	Specify your own string expression.
	`EXTRACT`	Extract it from another value.
	`GENERATE`	Generate the value.
`variable_value`	string (allows variables)	This directly specifies the value to assign to the variable. The expression may include a mix of static text and other variables, such as `new_filename.{{builtin.AK_EXTENSION}}` to embed a system variable.	`value_source` is `EXPRESSION`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"valueSource","op":"eq","value":"EXPRESSION"}}
`extract_location`	enum	This specifies from where to get the value.	`value_source` is `EXTRACT`	{"displayType":"enum","options":["CLIENT_CERTIFICATE","CLIENT_REQUEST_HEADER","COOKIE","EDGESCAPE","PATH_COMPONENT_OFFSET","QUERY_STRING","DEVICE_PROFILE","RESPONSE_HEADER","SET_COOKIE"],"tag":"select"} {"if":{"attribute":"valueSource","op":"eq","value":"EXTRACT"}}
	`CLIENT_CERTIFICATE`	Client certificate.
	`CLIENT_REQUEST_HEADER`	Client request header.
	`COOKIE`	Cookie.
	`EDGESCAPE`	For location or network data.
	`PATH_COMPONENT_OFFSET`	Substring within the URL path.
	`QUERY_STRING`	A query parameter.
	`DEVICE_PROFILE`	For client device attributes.
	`RESPONSE_HEADER`	A response header.
	`SET_COOKIE`	Cookie.
`certificate_field_name`	enum	Specifies the certificate's content.	`extract_location` is `CLIENT_CERTIFICATE`	{"displayType":"enum","options":["VERSION","SERIAL","FINGERPRINT_MD5","FINGERPRINT_SHA1","FINGERPRINT_DYN","ISSUER_DN","SUBJECT_DN","NOT_BEFORE","NOT_AFTER","SIGNATURE_ALGORITHM","SIGNATURE","CONTENTS_DER","CONTENTS_PEM","CONTENTS_PEM_NO_LABELS","COUNT","STATUS_MSG","KEY_LENGTH"],"tag":"select"} {"if":{"attribute":"extractLocation","op":"eq","value":"CLIENT_CERTIFICATE"}}
	`VERSION`	The certificate's X509 version number.
	`SERIAL`	The serial number, expressed in hex.
	`FINGERPRINT_MD5`	The hex-encoded MD5 fingerprint.
	`FINGERPRINT_SHA1`	The hex-encoded SHA1 fingerprint.
	`FINGERPRINT_DYN`	The hex-encoded fingerprint generated based on the `SIGNATURE_ALGORITHM`.
	`ISSUER_DN`	The distinguished name field for the certificate's issuer.
	`SUBJECT_DN`	The distinguished name field for the user.
	`NOT_BEFORE`	The start of the time range, expressed in `YYYY/MM/DD HH:MI:SS ZONE` format, where the zone is optional.
	`NOT_AFTER`	The end of the time range, expressed in `YYYY/MM/DD HH:MI:SS ZONE` format, where the zone is optional.
	`SIGNATURE_ALGORITHM`	The algorithm used to generate the certificate's signature.
	`SIGNATURE`	The certificate's signature, expressed in hex.
	`CONTENTS_DER`	The entire DER-encoded certificate, expressed in hex.
	`CONTENTS_PEM`	The PEM-formatted certificate encoded as a single line of base64 characters.
	`CONTENTS_PEM_NO_LABELS`	Same as `CONTENTS_PEM`, but not including the certificate's header and footer.
	`COUNT`	The number of client certificates received.
	`STATUS_MSG`	A short message indicating the status of a certificate's validation, such as `ok` or `missing`.
	`KEY_LENGTH`	The size of the key in bits.
`header_name`	string (allows variables)	Specifies the case-insensitive name of the HTTP header to extract.	`extract_location` is `CLIENT_REQUEST_HEADER`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"CLIENT_REQUEST_HEADER"}}
`response_header_name`	string (allows variables)	Specifies the case-insensitive name of the HTTP header to extract.	`extract_location` is `RESPONSE_HEADER`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"RESPONSE_HEADER"}}
`set_cookie_name`	string (allows variables)	Specifies the name of the origin's `Set-Cookie` response header.	`extract_location` is `SET_COOKIE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"SET_COOKIE"}}
`cookie_name`	string (allows variables)	Specifies the name of the cookie to extract.	`extract_location` is `COOKIE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"COOKIE"}}
`location_id`	enum	Specifies the `X-Akamai-Edgescape` header's field name. Possible values specify basic geolocation, various geographic standards, and information about the client's network. For details on EdgeScape header fields, see the EdgeScape User Guide.	`extract_location` is `EDGESCAPE`	{"displayType":"enum","options":["GEOREGION","COUNTRY_CODE","REGION_CODE","CITY","DMA","PMSA","MSA","AREACODE","COUNTY","FIPS","LAT","LONG","TIMEZONE","ZIP","CONTINENT","NETWORK","NETWORK_TYPE","ASNUM","THROUGHPUT","BW"],"tag":"select"} {"if":{"attribute":"extractLocation","op":"eq","value":"EDGESCAPE"}}
	`GEOREGION`	Region.
	`COUNTRY_CODE`	ISO-3166 country code.
	`REGION_CODE`	ISO-3166 region code.
	`CITY`	City.
	`DMA`	Designated Market Area.
	`PMSA`	Primary Metropolitan Statistical Area.
	`MSA`	Metropolitan Statistical Area.
	`AREACODE`	Area code.
	`COUNTY`	County.
	`FIPS`	Federal Information Processing System code.
	`LAT`	Latitude.
	`LONG`	Longitude.
	`TIMEZONE`	Time zone.
	`ZIP`	Zip code.
	`CONTINENT`	Two-letter continent code.
	`NETWORK`	Network name.
	`NETWORK_TYPE`	Network type.
	`ASNUM`	Autonomous System Number.
	`THROUGHPUT`	Tiered throughput level.
	`BW`	Tiered bandwidth level.
`path_component_offset`	string (allows variables)	This specifies a portion of the path. The indexing starts from `1`, so a value of `/path/to/nested/filename.html` and an offset of `1` yields `path`, and `3` yields `nested`. Negative indexes offset from the right, so `-2` also yields `nested`.	`extract_location` is `PATH_COMPONENT_OFFSET`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"PATH_COMPONENT_OFFSET"}}
`query_parameter_name`	string (allows variables)	Specifies the name of the query parameter from which to extract the value.	`extract_location` is `QUERY_STRING`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"extractLocation","op":"eq","value":"QUERY_STRING"}}
`generator`	enum	This specifies the type of value to generate.	`value_source` is `GENERATE`	{"displayType":"enum","options":["HEXRAND","RAND"],"tag":"select"} {"if":{"attribute":"valueSource","op":"eq","value":"GENERATE"}}
	`HEXRAND`	A random hex sequence.
	`RAND`	A random number.
`number_of_bytes`	number (1-16)	Specifies the number of random hex bytes to generate.	`generator` is `HEXRAND`	{"displayType":"number","max":[16],"min":[1],"tag":"input","type":"range"} {"if":{"attribute":"generator","op":"eq","value":"HEXRAND"}}
`min_random_number`	number	Specifies the lower bound of the random number.	`generator` is `RAND`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"generator","op":"eq","value":"RAND"}}
`max_random_number`	number	Specifies the upper bound of the random number.	`generator` is `RAND`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"generator","op":"eq","value":"RAND"}}
`transform`	enum	Specifies a function to transform the value. For more details on each transform function, see Set Variable: Operations.		{"displayType":"enum","options":["NONE","ADD","BASE_64_DECODE","BASE_64_ENCODE","BASE_32_DECODE","BASE_32_ENCODE","BITWISE_AND","BITWISE_NOT","BITWISE_OR","BITWISE_XOR","DECIMAL_TO_HEX","DECRYPT","DIVIDE","ENCRYPT","EPOCH_TO_STRING","EXTRACT_PARAM","HASH","JSON_EXTRACT","HEX_TO_DECIMAL","HEX_DECODE","HEX_ENCODE","HMAC","LOWER","MD5","MINUS","MODULO","MULTIPLY","NORMALIZE_PATH_WIN","REMOVE_WHITESPACE","COMPRESS_WHITESPACE","SHA_1","SHA_256","STRING_INDEX","STRING_LENGTH","STRING_TO_EPOCH","SUBSTITUTE","SUBSTRING","SUBTRACT","TRIM","UPPER","BASE_64_URL_DECODE","BASE_64_URL_ENCODE","URL_DECODE","URL_ENCODE","URL_DECODE_UNI","UTC_SECONDS","XML_DECODE","XML_ENCODE"],"tag":"select"}
	`NONE`	No transformation.
	`ADD`	Arithmetic function.
	`BASE_64_DECODE`	String encoding.
	`BASE_64_ENCODE`	String encoding.
	`BASE_32_DECODE`	String encoding.
	`BASE_32_ENCODE`	String encoding.
	`BITWISE_AND`	Bitwise operation.
	`BITWISE_NOT`	Bitwise operation.
	`BITWISE_OR`	Bitwise operation.
	`BITWISE_XOR`	Bitwise operation.
	`DECIMAL_TO_HEX`	Numeric conversion.
	`DECRYPT`	String encoding.
	`DIVIDE`	Arithmetic function.
	`ENCRYPT`	String encoding.
	`EPOCH_TO_STRING`	Time format.
	`EXTRACT_PARAM`	String format.
	`HASH`	Integer data digest.
	`JSON_EXTRACT`	JSONPath extraction from a variable.
	`HEX_TO_DECIMAL`	Numeric conversion.
	`HEX_DECODE`	String conversion.
	`HEX_ENCODE`	String conversion.
	`HMAC`	Data digest.
	`LOWER`	String function.
	`MD5`	Data digest.
	`MINUS`	Arithmetic function, reverse sign.
	`MODULO`	Arithmetic function, get remainder.
	`MULTIPLY`	Arithmetic function.
	`NORMALIZE_PATH_WIN`	Convert Windows paths to Unix format and remove relative path syntax.
	`REMOVE_WHITESPACE`	String conversion.
	`COMPRESS_WHITESPACE`	Convert whitespace characters to spaces, then compress multiple space characters into only one.
	`SHA_1`	Data digest.
	`SHA_256`	Data digest.
	`STRING_INDEX`	String function: locate substring.
	`STRING_LENGTH`	String function.
	`STRING_TO_EPOCH`	Time format.
	`SUBSTITUTE`	String function.
	`SUBSTRING`	String function: locate index.
	`SUBTRACT`	Arithmetic function.
	`TRIM`	Trim surrounding whitespace in string.
	`UPPER`	String function.
	`BASE_64_URL_DECODE`	The same as `BASE_64_DECODE`, except before decoding replaces `+` with `-` and `/` with `_`. If due to the encoding there are not enough characters for the algorithm, this adds `=` characters at the end of the string. See Output padding for more information.
	`BASE_64_URL_ENCODE`	The same as `BASE_64_ENCODE`, except after encoding this removes trailing `=` characters, replacing `+` with `-` and `/` with `_`.
	`URL_DECODE`	String conversion.
	`URL_ENCODE`	Unicode string conversion.
	`URL_DECODE_UNI`	String conversion.
	`UTC_SECONDS`	Time format.
	`XML_DECODE`	String conversion.
	`XML_ENCODE`	String conversion.
`operand_one`	string (allows variables)	Specifies an additional operand when the `transform` function is set to various arithmetic functions (`ADD`, `SUBTRACT`, `MULTIPLY`, `DIVIDE`, or `MODULO`) or bitwise functions (`BITWISE_AND`, `BITWISE_OR`, or `BITWISE_XOR`).	`transform` is either: `ADD`, `BITWISE_AND`, `BITWISE_OR`, `BITWISE_XOR`, `DIVIDE`, `MODULO`, `MULTIPLY`, `SUBTRACT`, `JSON_EXTRACT`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"in","value":["ADD","BITWISE_AND","BITWISE_OR","BITWISE_XOR","DIVIDE","MODULO","MULTIPLY","SUBTRACT","JSON_EXTRACT"]}}
`algorithm`	enum	Specifies the algorithm to apply.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"enum","options":["ALG_3DES","ALG_AES128","ALG_AES256"],"tag":"select"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
	`ALG_3DES`	Triple DES.
	`ALG_AES128`	Advanced Encryption Standard, 128 bits.
	`ALG_AES256`	Advanced Encryption Standard, 256 bits.
`encryption_key`	string (allows variables)	Specifies the encryption hex key. For `ALG_3DES` it needs to be 48 characters long, 32 characters for `ALG_AES128`, and 64 characters for `ALG_AES256`.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
`initialization_vector`	string	Specifies a one-time number as an initialization vector. It needs to be 15 characters long for `ALG_3DES`, and 32 characters for both `ALG_AES128` and `ALG_AES256`.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
`encryption_mode`	enum	Specifies the encryption mode.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"enum","options":["CBC","ECB"],"tag":"select"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
	`CBC`	Cipher Block Chaining.
	`ECB`	Electronic Codebook.
`nonce`	string (allows variables)	Specifies the one-time number used for encryption.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
`prepend_bytes`	boolean	Specifies a number of random bytes to prepend to the key.	`transform` is either: `ENCRYPT`, `DECRYPT`	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"transform","op":"in","value":["ENCRYPT","DECRYPT"]}}
`format_string`	string	Specifies an optional format string for the conversion, using format codes such as `%m/%d/%y` as specified by `strftime`. A blank value defaults to RFC-2616 format.	`transform` is either: `EPOCH_TO_STRING`, `STRING_TO_EPOCH`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"in","value":["EPOCH_TO_STRING","STRING_TO_EPOCH"]}}
`param_name`	string (allows variables)	Extracts the value for the specified parameter name from a string that contains key/value pairs. (Use `separator` below to parse them.)	`transform` is `EXTRACT_PARAM`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"EXTRACT_PARAM"}}
`separator`	string	Specifies the character that separates pairs of values within the string.	`transform` is `EXTRACT_PARAM`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"EXTRACT_PARAM"}}
`min`	number	Specifies a minimum value for the generated integer.	`transform` is `HASH`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"transform","op":"eq","value":"HASH"}}
`max`	number	Specifies a maximum value for the generated integer.	`transform` is `HASH`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"transform","op":"eq","value":"HASH"}}
`hmac_key`	string (allows variables)	Specifies the secret to use in generating the base64-encoded digest.	`transform` is `HMAC`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"HMAC"}}
`hmac_algorithm`	enum	Specifies the algorithm to use to generate the base64-encoded digest.	`transform` is `HMAC`	{"displayType":"enum","options":["SHA1","SHA256","MD5"],"tag":"select"} {"if":{"attribute":"transform","op":"eq","value":"HMAC"}}
	`SHA1`	SHA-1.
	`SHA256`	SHA-256.
	`MD5`	MD5.
`ip_version`	enum	Specifies the IP version under which a subnet mask generates.	`transform` is `NETMASK`	{"displayType":"enum","options":["IPV4","IPV6"],"tag":"select"} {"if":{"attribute":"transform","op":"eq","value":"NETMASK"}}
	`IPV4`	Use IPv4.
	`IPV6`	Use IPv6.
`ipv6Prefix`	number (0-128)	Specifies the prefix of the IPV6 address, a value between 0 and 128.	`ip_version` is `IPV6`	{"displayType":"number","max":[128],"min":[0],"tag":"input","type":"range"} {"if":{"attribute":"ipVersion","op":"eq","value":"IPV6"}}
`ipv4Prefix`	number (0-32)	Specifies the prefix of the IPV4 address, a value between 0 and 32.	`ip_version` is `IPV4`	{"displayType":"number","max":[32],"min":[0],"tag":"input","type":"range"} {"if":{"attribute":"ipVersion","op":"eq","value":"IPV4"}}
`sub_string`	string (allows variables)	Specifies a substring for which the returned value represents a zero-based offset of where it appears in the original string, or `-1` if there's no match.	`transform` is `STRING_INDEX`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"STRING_INDEX"}}
`regex`	string	Specifies the regular expression pattern (PCRE) to match the value.	`transform` is `SUBSTITUTE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"SUBSTITUTE"}}
`replacement`	string (allows variables)	Specifies the replacement string. Reinsert grouped items from the match into the replacement using `$1`, `$2` ... `$n`.	`transform` is `SUBSTITUTE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"SUBSTITUTE"}}
`case_sensitive`	boolean	Enabling this makes all matches case sensitive.	`transform` is either: `EXTRACT_PARAM`, `SUBSTITUTE`	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"transform","op":"in","value":["EXTRACT_PARAM","SUBSTITUTE"]}}
`global_substitution`	boolean	Replaces all matches in the string, not just the first.	`transform` is `SUBSTITUTE`	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"transform","op":"eq","value":"SUBSTITUTE"}}
`start_index`	number	Specifies the zero-based character offset at the start of the substring. Negative indexes specify the offset from the end of the string. Consider this example for a string of `abcdefghij`: `start_index` = 0, `end_index` = 1, result = `a` `start_index` = 0, `end_index` = 2, Result = `ab` `start_index` = 1, `end_index` = 1, Result = `<null>` `start_index` = 1, `end_index` = 2, Result = `b` `start_index` = 3, `end_index` = -1, Result = `defghij` `start_index` = -2, `end_index` = -1, Result = `j`	`transform` is `SUBSTRING`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"transform","op":"eq","value":"SUBSTRING"}}
`end_index`	number	Specifies the zero-based character offset at the end of the substring, without including the character at that index position. Negative indexes specify the offset from the end of the string. Consider this example for a string of `abcdefghij`: `start_index` = 0, `end_index` = 1, result = `a` `start_index` = 0, `end_index` = 2, Result = `ab` `start_index` = 1, `end_index` = 1, Result = `<null>` `start_index` = 1, `end_index` = 2, Result = `b` `start_index` = 3, `end_index` = -1, Result = `defghij` `start_index` = -2, `end_index` = -1, Result = `j`	`transform` is `SUBSTRING`	{"displayType":"number","tag":"input","type":"number"} {"if":{"attribute":"transform","op":"eq","value":"SUBSTRING"}}
`except_chars`	string	Specifies characters not to encode, possibly overriding the default set.	`transform` is `URL_ENCODE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"URL_ENCODE"}}
`force_chars`	string	Specifies characters to encode, possibly overriding the default set.	`transform` is `URL_ENCODE`	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"transform","op":"eq","value":"URL_ENCODE"}}
`device_profile`	enum	Specifies the client device attribute. Possible values specify information about the client device, including device type, size and browser. For details on fields, see Device Characterization.	`extract_location` is `DEVICE_PROFILE`	{"displayType":"enum","options":["IS_MOBILE","IS_TABLET","IS_WIRELESS_DEVICE","PHYSICAL_SCREEN_HEIGHT","PHYSICAL_SCREEN_WIDTH","RESOLUTION_HEIGHT","RESOLUTION_WIDTH","VIEWPORT_WIDTH","BRAND_NAME","DEVICE_OS","DEVICE_OS_VERSION","DUAL_ORIENTATION","MAX_IMAGE_HEIGHT","MAX_IMAGE_WIDTH","MOBILE_BROWSER","MOBILE_BROWSER_VERSION","PDF_SUPPORT","COOKIE_SUPPORT"],"tag":"select"} {"if":{"attribute":"extractLocation","op":"eq","value":"DEVICE_PROFILE"}}
	`IS_MOBILE`	Basic device attributes, boolean.
	`IS_TABLET`	Basic device attributes, boolean.
	`IS_WIRELESS_DEVICE`	Basic device attributes, boolean.
	`PHYSICAL_SCREEN_HEIGHT`	Device screen size in millimeters.
	`PHYSICAL_SCREEN_WIDTH`	Device screen size in millimeters.
	`RESOLUTION_HEIGHT`	Device screen size in pixels.
	`RESOLUTION_WIDTH`	Device screen size in pixels.
	`VIEWPORT_WIDTH`	Device viewport size in millimeters.
	`BRAND_NAME`	Basic device attributes, string values.
	`DEVICE_OS`	Basic device attributes, string values.
	`DEVICE_OS_VERSION`	Basic device attributes, string values.
	`DUAL_ORIENTATION`	Whether the display adapts to portrait/landscape orientation.
	`MAX_IMAGE_HEIGHT`	Maximum image size that can be displayed, in pixels.
	`MAX_IMAGE_WIDTH`	Maximum image size that can be displayed, in pixels.
	`MOBILE_BROWSER`	Basic device attributes, string values.
	`MOBILE_BROWSER_VERSION`	Basic device attributes, string values.
	`PDF_SUPPORT`	Device support capabilities, boolean.
	`COOKIE_SUPPORT`	Device support capabilities, boolean.

Updated about 1 month ago