Any parameters that reference a variable support the following variables:
•<%CurrentPageFolder%> - The current folder URL where the web part resides (e.g., http://www.company.com/sites/site1/connections)
•<%HostName%> - The host name of the site where the web part resides (e.g., www.company.com)
•<%SiteSecurityType%> - The protocol type of the site where the web part resides (e.g., http://)
•<%SiteURL%> - The absolute path to the site where the web part resides (e.g., http://www.company.com/sites/site1)
Example: <%SiteSecurityType%><%HostName%>/data/connections/dataprovider.aspx
NOTE: All fields can have a default value set via the query string by passing in the name of the field and the value to set as the default. For example: ?FieldName=10