XML String Syntax

XML profiles can be described using strings. This configuration is useful for architectures without a file system.

There are two different ways to configure Entities via XML strings:

• String URLs are prefixed by the URI schema str:// and enclosed in double quotes. For example:

 str://"<dds><qos_library>...</qos_library></dds>"

The string URLs can be specified in the environment variable NDDS_QOS_PROFILES as well as in the field url_profile in PROFILE QosPolicy (DDS Extension) . Each string URL must contain a whole XML document.

• The string_profile field in the PROFILE QosPolicy (DDS Extension) allows you to split an XML document into multiple strings. For example:

const char * MyXML[4] = 
{
    "<dds>",
	"<qos_library name=\"MyLibrary\">",
	"</qos_library>",
    "</dds>"
};
factoryQos.profile.string_profile.from_array(MyXML,4);

Only one XML document can be specified with the string_profile field.

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