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!
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! SDDL Name:	WSISTATE_SEQ.SDDL
!
! Purpose:      This SDDL file defines the WSISTATE_SEQ relation.
!
! Modification History:
!
!   Date       OPR      Who                       Reason
! --------   -------    ---   -------------------------------------------------
! 10/ 4/94    27329     NSS   Original implementation
! 11/29/95    30445     NLC   Duplicate type SI_STATE_TYPE; rename to      
!			      SI_CONFIG_STATE_TYPE
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
!

LANGUAGE	FORTRAN, SQL

INCLUDE		ZSPSS_USER_TYPES.SDDL

RECORD  SISEQ_TYPE

!------------------------------------------------------------------------------
!
!   RECORD INFORMATION
!
!------------------------------------------------------------------------------

    DESCRIPTION       "This relation is used to define Science Instrument (SI)
                       and SI Detector state transition sequences. A sequence
                       is a collection of state transitions, with a specific
                       upward or downward ordering.

		       For example, suppose that there is an SI on board
                       the HST. There are 3 modes for this instrument: HOLD,
                       WARM, and CAPTURE. A typical user will want to operate
                       the SI in the CAPTURE mode while observing a target.
                       At a minimum, the SI must transition thru the WARM
                       mode prior to transitioning up to the CAPTURE mode.

                       Thus, a sequence is needed to define how the SI cycles
                       from the HOLD state to the CAPTURE state. Given that
                       entries have been defined for the individual HOLD<->WARM
                       and WARM<->CAPTURE transitions, entries within this 
                       relation can be defined to describe these sequences.

                       For the upward sequence from HOLD to CAPTURE, there would
                       be 2 entries:

		         o  the HOLD->WARM transition would be position 1 within
                            this upward sequence

                         o  the WARM->CAPTURE transition would be position 2
                            within this upward sequence
                  
		       For the downward sequence from CAPTURE to HOLD, there
                       would be 2 entries:

		         o  the CAPTURE->WARM transition would be position 1 
                            within this downward sequence

                         o  the WARM->HOLD transition would be position 2
                            within this downward sequence"

!------------------------------------------------------------------------------
!
!   FIELD INFORMATION
!
!------------------------------------------------------------------------------



    FIELD  si_name
        TYPE SI_ID_TYPE
    END_FIELD



    FIELD  si_det_name
        TYPE SI_DETECTOR_TYPE
        DESCRIPTION     "This field is blank for an SI sequence."
    END_FIELD



    FIELD  sequence_id
        TYPE            C8
        DESCRIPTION     "This field is the ID uniquely identifying the 
                         transition sequence being defined."
    END_FIELD



    FIELD  state_name
        TYPE SI_CONFIG_STATE_TYPE
        DESCRIPTION     "This field is the state name that is defined as a 
                         position (or step) within a sequence."
    END_FIELD



    FIELD  sequence_pos
        TYPE            I2
        DESCRIPTION     "This field is the relative position of this state in 
                         the transition sequence. This value should reflect 
                         the order in which this state appears in the sequence. 
                         Thus for an upward sequence, a lower state must 
                         precede a higher state in the sequence order, and 
                         vice versa for a downward sequence"
    END_FIELD



    FIELD  trans_type
        TYPE            C1
        DESCRIPTION     "This field is a flag indicating whether this sequence
                         is an upward, a downward sequence type, or both. If 
                         set to both, then the sequence definition is for an 
                         upward transition, with the definition for the 
                         reverse downward sequence implied. The entire 
                         transition sequence must be strictly upward, or 
                         strictly downward."
        DISCRETE        "U", "D", "B" 
    END_FIELD


END_RECORD


!------------------------------------------------------------------------------
!
!   RELATION DECLARATION
!
!------------------------------------------------------------------------------


RELATION  wsistate_seq

    TYPE             SISEQ_TYPE

    DESCRIPTION      "SI and Detector State Transition Sequence Relation"

    SUBSYSTEM_USING  "SPSS", "IM", "SCIOPSDB", "CCLIST"

    RELATED_FIELDS  "wsidata_def.*" "wsistate_def.*" "wsistate_tra.*"


    INDEX  wsistate_seq_1
        TYPE         unique, clustered
        FIELDS       si_name, si_det_name, sequence_id, trans_type, state_name
    END_INDEX

    INDEX  wsistate_seq_2
        TYPE         unique, nonclustered
        FIELDS       si_name, si_det_name, sequence_id, trans_type, sequence_pos
    END_INDEX

END_RELATION

!------------------------------------------------------------------------------
!
!   INSTANCE DECLARATION
!
!------------------------------------------------------------------------------


INSTANCE  wsistate_seq

    GLOBAL

    TYPE        SISEQ_TYPE

END_INSTANCE

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