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* no mixed formats (for example 'int' and 'short') will be allowed in the same bank, format is described in 8-bit field ''contentType'' | * no mixed formats (for example 'int' and 'short') will be allowed in the same bank, format is described in 8-bit field ''contentType'' | ||
* BOS bank name will be replaced with 16-bit | * BOS bank name will be replaced with 16-bit field ''tag'', BOS bank number will be replaced with 8-bit field ''num'' | ||
* banks description (former DDL) will be provided in some form (ASCII, Dadabase ?) which will contains a notation on every bank ''tag'', most important will be the number of 'columns' and the meaning of every column (for example id,tdcl,adcl,tdcr,tdcl), it will help to decode data from the bank and can be used by evio viewers; will be written in the beginning of every file | * banks description (former DDL) will be provided in some form (ASCII, Dadabase ?) which will contains a notation on every bank ''tag'', most important will be the number of 'columns' and the meaning of every column (for example id,tdcl,adcl,tdcr,tdcl), it will help to decode data from the bank and can be used by evio viewers; will be written in the beginning of every file | ||
Revision as of 11:23, 28 September 2011
EVIO is data format and corresponding software used at JLAB.
EVIO Manual version 2.0: pdf doc.
Event Building EVIO Scheme: pdf ppt pptx.
CLAS12 guidelines:
- 'EVIO BANK' (not 'EVIO SEGMENT' or 'EVIO TAGSEGMENT' will be used for data banks; it ...
- no mixed formats (for example 'int' and 'short') will be allowed in the same bank, format is described in 8-bit field contentType
- BOS bank name will be replaced with 16-bit field tag, BOS bank number will be replaced with 8-bit field num
- banks description (former DDL) will be provided in some form (ASCII, Dadabase ?) which will contains a notation on every bank tag, most important will be the number of 'columns' and the meaning of every column (for example id,tdcl,adcl,tdcr,tdcl), it will help to decode data from the bank and can be used by evio viewers; will be written in the beginning of every file
EVIO block(record) header: 8 32-bit words
1. block length 2. block number 3. header length=8 4. event count (# of banks, without dictionary if it is inserted) 5. not used 6. bit info[31-8] version [7-0]; if dectionary is therer, bit 8 (starting from 0) will be set 7. unused 8. magic int = 0xc0da0100