Re: [Psidev-ms-dev] Smaller files

[Matthew C. <mat...@va...>]

Compression and data type/precision are cv params for the 
BinaryDataArray elements:
MS_zlib_compression = 1000574
MS_no_compression = 1000576

MS_32_bit_integer = 1000519
MS_16_bit_float = 1000520
MS_32_bit_float = 1000521
MS_64_bit_integer = 1000522
MS_64_bit_float = 1000523

Rune Schjellerup Philosof wrote:
> I looked for the capability in the latest (20080327) snapshot xsd from 
> Lennart and couldn't find it.
> Isn't integer intensities also quite common.
> Data from the Waters Premier seem to be integer ion counts.
>
> -Rune
>
> Matt Chambers wrote:
>   
>> Hi Rune, mzML has both of these capabilities. With separate binary 
>> arrays (like mzXML 3.0 theoretically supports but so far is rare in the 
>> wild), the m/z array can be 64 and the intensity array can be 32, which 
>> is most likely to fit current instrument capabilities. Also, 
>> chromatogram time values probably don't need 64 bit either. SPC's 
>> converter tools support writing and reading compressed mzML last time I 
>> checked.
>>
>> -Matt
>>
>>
>> Rune Schjellerup Philosof wrote:
>>   
>>     
>>> In mzXML 3.0 there are two options for generating smaller files.
>>> 1. Saving in 32bit instead of 64bit.
>>> 2. Compressing the scans using zllib.
>>>
>>> Any special reasons why these features hasn't survived into mzML (yet)?
>>>
>>> --
>>> Regards
>>> Rune
>>>
>>>   
>>>     
>>>       
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