Describe the plugin provider:

typedef struct
{
  std::string name;   //!< Provider name: may be a person or a company.
  std::string site;   //!< The provider home page.
  std::string email;  //!< The provider contact e-mail.
} provider_t;

Describe the host system:

typedef struct
{
  std::string version;
} host_application_t;

typedef std::pair<std::string, std::string> resource_t;

typedef std::pair<std::string, std::string> parameter_t;

Basic information about a plugin.

typedef struct
{
  std::string name;                      //!< The plugin name: an internal value used to identify the plugin in the system. Must be a unique value.
  std::string display_name;              //!< The plugin name to be displayed in a graphical interface.
  std::string description;               //!< A brief explanation about the plugin.
  std::string version;                   //!< The plugin version.
  std::string release;                   //!< The release date of the plugin. This may be used to identify new versions of a given plugin.
  std::string engine;                    //!< The type of plugin execution engine: C++, JAVA, LUA or any other supported engine.
  std::string license_description;       //!< A brief description about the plugin license.
  std::string license_URL;               //!< An URL where someone can find more information on the license.
  std::string site;                      //!< An URL pointing to the plugin site.
  provider_t provider;                   //!< Information about the plugin provider.
  std::vector<std::string> dependencies; //!< The list of required plugins in order to lunch the plugin.
  std::vector<resource_t> resources;     //!< The list of resources used by plugin.
  std::vector<parameter_t> parameters;   //!< Any configuration parameter that can be informed to plugin (map: parameter-name -> parameter-value).
  host_application_t host_application;   //!< Information about the host system. May be used to validate the plugin version.
} plugin_info_t;