-The meta-data is located in a stream named "metadata". It is made of "event
-packets", which each start with an event packet header. The event type within
-the metadata stream have no event header nor event context. Each event only
-contains a null-terminated "string" payload, which is a metadata description
-entry. The events are packed one next to another. Each event packet start with
-an event packet header, which contains, amongst other fields, the magic number
-and trace UUID.
+The meta-data is located in a stream identified by its name: "metadata".
+It is made of "event packets", which each start with an event packet
+header. The event type within the metadata stream have no event header
+nor event context. Each event only contains a null-terminated "string"
+payload, which is a metadata description entry. The events are packed
+one next to another. Each event packet start with an event packet
+header, which contains, amongst other fields, the magic number and trace
+UUID. In the event packet header, the trace UUID is represented as an
+array of bytes. Within the string-based metadata description, the trace
+UUID is represented as a string of hexadecimal digits and dashes "-".
+
+The metadata can be parsed by reading through the metadata strings,
+skipping null-characters. Type names are made of a single identifier,
+and can be surrounded by prefix/postfix. Text contained within "/*" and
+"*/", as well as within "//" and end of line, are treated as comments.
+Boolean values can be represented as true, TRUE, or 1 for true, and
+false, FALSE, or 0 for false.
+
+
+7.1 Declaration vs Definition
+
+A declaration associates a layout to a type, without specifying where
+this type is located in the event structure hierarchy (see Section 6).
+This therefore includes typedef, typealias, as well as all type
+specifiers. In certain circumstances (typedef, structure field and
+variant field), a declaration is followed by a declarator, which specify
+the newly defined type name (for typedef), or the field name (for
+declarations located within structure and variants). Array and sequence,
+declared with square brackets ("[" "]"), are part of the declarator,
+similarly to C99. The enumeration base type is specified by
+": base_type", which is part of the type specifier. The variant tag
+name, specified between "<" ">", is also part of the type specifier.
+
+A definition associates a type to a location in the event structure
+hierarchy (see Section 6). This association is denoted by ":=", as shown
+in Section 7.3.