diff --git a/Doxyfile b/Doxyfile
index 82ad9703..5a4bfdfd 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -728,7 +728,7 @@ TREEVIEW_WIDTH         = 250
 # If the GENERATE_LATEX tag is set to YES (the default) Doxygen will 
 # generate Latex output.
 
-GENERATE_LATEX         = NO
+GENERATE_LATEX         = YES
 
 # The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
 # If a relative path is entered the value of OUTPUT_DIRECTORY will be 
@@ -782,7 +782,7 @@ PDF_HYPERLINKS         = NO
 # plain latex in the generated Makefile. Set this option to YES to get a 
 # higher quality PDF documentation.
 
-USE_PDFLATEX           = NO
+USE_PDFLATEX           = YES
 
 # If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. 
 # command to the generated LaTeX files. This will instruct LaTeX to keep 
diff --git a/include/ecrt.h b/include/ecrt.h
index 1e1b93bc..5a43de8b 100644
--- a/include/ecrt.h
+++ b/include/ecrt.h
@@ -58,15 +58,22 @@ typedef struct ec_domain ec_domain_t;
 struct ec_slave;
 typedef struct ec_slave ec_slave_t;
 
+/**
+   Initialization type for field registrations.
+   This type is used as a parameter for the ec_domain_register_field_list()
+   function.
+*/
+
 typedef struct
 {
-    void **data_ptr;
-    const char *slave_address;
-    const char *vendor_name;
-    const char *product_name;
-    const char *field_name;
-    unsigned int field_index;
-    unsigned int field_count;
+    void **data_ptr; /**< address of the process data pointer */
+    const char *slave_address; /**< slave address string (see
+                                  ecrt_master_get_slave()) */
+    const char *vendor_name; /**< vendor name */
+    const char *product_name; /**< product name */
+    const char *field_name; /**< data field name */
+    unsigned int field_index; /**< index in data fields with same name */
+    unsigned int field_count; /**< number of data fields with same name */
 }
 ec_field_init_t;