ALL_HTTP are all HTTP headers sent by the client.

ALL_RAW retrieves all headers in the raw-form.

APPL_MD_PATH retrieves the metabase path.

APPL_PHYSICAL_PATH retrieves the physical path corresponding to the metabase path.

AUTH_PASSWORD is the value entered in the client's authentication dialog.

AUTH_TYPE is the authentication method that the server uses to validate users.

AUTH_USER is the raw authenticated user name.

CERT_COOKIE is an unique ID for client certificate which is returned as a string.

CERT_FLAGS is where bit0 is set to 1 if the client certificate is present, and bit1 is set to 1 if the certifying authority of the client certificate is invalid.

CERT_ISSUER is the issuer field of the client certificate.

CERT_KEYSIZE is the number of bits in Secure Sockets Layer connection key size.

CERT_SECRETKEYSIZE is the number of bits in the server certificate private key.

CERT_SERIALNUMBER is the serial number field of the client certificate.

CERT_SERVER_ISSUER is the issuer field of the server certificate.

CERT_SERVER_SUBJECT is the subject field of the server certificate.

CERT_SUBJECT is the subject field of the client certificate.

CONTENT_LENGTH is the length of the content header as sent by the client.

CONTENT_TYPE is the data type of the content.

GATEWAY_INTERFACE is the revision of the CGI specification used by the server.

HTTP_<HeaderName> is the value stored in the header HeaderName.

HTTP_ACCEPT returns the value of the Accept header.

HTTP_ACCEPT_ENCODING returns the value of the Accept encoding.

HTTP_ACCEPT_LANGUAGE returns a string that specifies the language to be used for displaying content.

HTTP_CONNECTION returns a string containing information about the connection.

HTTP_COOKIE returns the cookie string that was included with the request.

HTTP_HOST returns a string containing information about the host.

HTTP_REFERER returns a string containing the original URL when a redirect has occurred.

HTTP_USER_AGENT returns a string describing the browser used to send the request.

HTTP_UA_PIXELS returns a string detailing the screen resolution of the user agent.

HTTP_UA_COLOR returns a string with color information.

HTTP_UA_OS returns a string stating the operating system of the user agent.

HTTP_UA_CPU returns a string stating the processor type used by the user agent.

HTTPS returns ON if the request came in through secure channel or OFF if the request is through a non-secure channel.

HTTPS_KEYSIZE is the number of bits in Secure Sockets Layer (SSL) connection key size.

HTTPS_SECRETKEYSIZE is the number of bits in server certificate private key.

HTTPS_SERVER_ISSUER is the issuer field of the server certificate.

HTTPS_SERVER_SUBJECT is the subject field of the server certificate.

INSTANCE_ID is the ID for the Internet Information Server (IIS) instance in text format.

INSTANCE_META_PATH is the metabase path for the instance of Internet Information Server (IIS) that responds to the request.

LOCAL_ADDR returns the server address on which the request came in.

LOGON_USER is the Windows account that the user is logged into.

PATH_INFO is extra path information as given by the client.

PATH_TRANSLATED is a translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping.

QUERY_STRING is the query information stored in the string following the question mark (?) in the HTTP request.

REMOTE_ADDR is the Internet Protocol (IP) address of the remote host making the request.

REMOTE_HOST is the name of the host making the request.

REMOTE_USER is an unmapped user-name string sent in by the user.

REQUEST_METHOD is the method used to make the request.

SCRIPT_NAME is a virtual path to the script being executed.

SERVER_NAME is the server's host name, Domain Name Server (DNS) alias, or Internet Protocol (IP) address.

SERVER_PORT is the port number to which the request was sent.

SERVER_PORT_SECURE is a string that contain a 1 if the request is being handled on the secure port, otherwise it is 0.

SERVER_PROTOCOL is the name and revision of the request information protocol.

SERVER_SOFTWARE is the name and version of the server software that answers the request and runs the gateway.

URL is the base portion of the URL.