Spec for AMF version 0 omits the use of markers for ecma array and strict array?

[Coosis]

Hi, i was looking at the spec at https://rtmp.veriskope.com/pdf/amf0-file-format-specification.pdf. I noticed that on page 6, ECMA Array Type is described as associative-count *(object-property), where associative-count is a U32 and object-property is often UTF-8 value-type. That's it. So is the ecma marker just not used? I went and checked some other implementations, they seem to assume there's a marker at the start of serialized data. Same with Strict Array Type. Should the marker be avoided?

[zenomt]

the specification seems to have left out the markers to indicate an ECMA Array (ecma-array-marker 0x08) or a Strict Array (strict-array-marker 0x0A). those two collection types start with their corresponding marker byte and then their values are as shown. an unfortunate omission.

also, i see Typed Object section 2.18 shows an incorrect marker (the doc says object-marker instead of typed-object-marker).

finally, i see the heading of each page says "Adobe Systems Incorporated ... AMF 3 Specification" even though this is the AMF 0 specification.

while the AMF 0 specification doesn't say so, i've found that all implementations (including Flash Player) seem to require that an ECMA Array be terminated with an "end of object" object-end-type (UTF-8-empty object-end-marker) just like Object; or in other words, an ECMA Array is serialized just like an Object except that it has a different marker and has a count of how many members it has. implementations including Flash Player will not properly deserialize an ECMA Array if it isn't terminated with an object-end-type. Flash Player seems to set the associative-count to 0 when serializing EMCA Arrays, which means ECMA Arrays are not particularly semantically useful. while there is a separate class in Flash Player for ECMA Array vs Object, in the modern JSON era you would just use Object. i think the intent of ECMA Array is to distinguish an anonymous ActionScript object that you are serializing from an explicit collection object.