Contextual Mechanism | Contextless Mechanism

    Contextual Rules

    Aggregation Method

    Execution Order

    The rules are applied in the order they appear below: Green, Orange, Blue and finally Red.

    Each rule has its own conditions which must be met before the rule is applied, so this is not strictly an ordering, but there is a dependency that the Green rule is checked before both the Orange and Blue rules, and that the Blue rule is checked before the the Red rule.

    By checked we mean that the conditions of the rule are checked, and if they are met then the rule is executed and the correct data values are changed.

  1. Green Rule

    2. The Green rule applies a high watermark heuristic on the classification levels of the two assets being aggregated. If asset a has classification level 1 and asset b has classification level 2 then the Green rule states that the aggregated asset a,b will have a classification level of 2.

    AssetCltn
    a1
    b2
    a,b(1,2)=2

  2. Orange Rule

    3. The Orange rule upgrades the classification level from level 1 to level 2 when the two assets being aggregated both have a level 1 classification and the Adjacency1 value for the aggregated asset is negative.

    The Orange rule also states that the negative value that has resulted must be replaced by the lowest Adjacency1 value for the single assets which make up the aggregated asset.

    The following example shows the Orange rule being applied; the asset abc is being aggregated with d, which results in the Adjacency1 value being negative. This negative value needs replacing and because c has the lowest value, the Adjacency1 value of abc,d become 2.

    AssetCltnAdj1Adj2C1C2
    a 1 4 3 1 0
    b 1 3 2 1 0
    c 1 2 2 1 0
    d 1 3 2 1 0
    abc 1 0 2 3 0
    abc,d(1,1)=1 2(0,1),(3,3)=(-1,0)=-1
    Pick lowest Adj1 for a,b,c & d = 2    		(2,0),(2,0)=(2,2)=2(3+1)=4(0+0)=0

  3. Blue Rule

    4. The Blue rule states that when both parameters at Adjacency1 are negative and the aggregated asset has a classification level of 2, a -1 should be pushed on to the Adjacency2 value for the aggregated asset.

    AssetCltnAdj1Adj2C1C2
    gf 2 0 2 2 0
    h 1 1 2 1 0
    gf,h(2,1)=2(0,1),(1,2)=(-1,-1)=-1(2,0),(2,0)=(2,2)=2, 2-1=1(2+1)=3(0+0)=0

  4. Red Rule

    5. The Red rule is the last rule to be applied. The Red rule is almost identical to the Orange rule, however because there is no guarantee that there are any single assets with a level 2 classification the resultant negative value is not replaced.

    If the Adjacency2 value of the aggregated asset is negative and the classification (after the Green rule has been applied) is level 2, then the Red rule forces the classification level up one level to level 3.

    In the example below, the Green rule has caused the classification level to be set to the higher of the two individual classification levels. The Blue rule has also already been executed because the two parameters in the Adjacency1 column are negative. This causes the value in the Adjacency2 column to drop from 0 to -1. At this point the conditions for the Red rule are met, and so the classification of abcdefgh,i is upgraded to level 3.

    AssetCltnAdj1Adj2C1C2
    i 1 2 1 1 0
    abcdegfh 2 -3 0 7 1
    abcdefgh,i(2,1)=2 3(-3,1),(2,7)=(-4,-5)=-5(0,0),(1,1)=(0,0)=0, 0-1=-1(7+1)=8(1+0)=1

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    Contextless Rules

    Aggregation Method

    Execution Order

    The rules are applied in the order they appear below: Green, Orange, Blue and finally Red.

    Each rule has its own conditions which must be met before the rule is applied, so this is not strictly an ordering, but there is a dependency that the Green rule is checked before both the Orange and Blue rules, and that the Blue rule is checked before the the Red rule.

    By checked we mean that the conditions of the rule are checked, and if they are met then the rule is executed and the correct data values are changed.

  1. Green Rule

    2. The Green rule applies a high watermark heuristic on the classification levels of the two assets being aggregated. If asset a has classification level 1 and asset b has classification level 2 then the Green rule states that the aggregated asset a,b will have a classification level of 2.

    AssetCltn
    a1
    b2
    a,b(1,2)=2

  2. Orange Rule

    3. The Orange rule upgrades the classification level from level 1 to level 2 when the two assets being aggregated both have a level 1 classification and the Adjacency1 value for the aggregated asset is negative.

    The Orange rule also states that the negative value that has resulted must be replaced by the lowest Adjacency1 value for the single assets which make up the aggregated asset.

    The following example shows the Orange rule being applied; the asset abc is being aggregated with d, which results in the Adjacency1 value being negative. This negative value needs replacing and because c has the lowest value, the Adjacency1 value of abc,d become 2.

    AssetCltnAdj1Adj2C1C2
    a 1 4 3 1 0
    b 1 3 2 1 0
    c 1 2 2 1 0
    d 1 3 2 1 0
    abc 1 0 2 3 0
    abc,d(1,1)=1 2(0,1),(3,3)=(-1,0)=-1
    Pick lowest Adj1 for a,b,c & d = 2    		(2,0),(2,0)=(2,2)=2(3+1)=4(0+0)=0

  3. Blue Rule

    4. The Blue rule states that when both parameters at Adjacency1 are negative and the aggregated asset has a classification level of 2, a -1 should be pushed on to the Adjacency2 value for the aggregated asset.

    AssetCltnAdj1Adj2C1C2
    gf 2 0 2 2 0
    h 1 1 2 1 0
    gf,h(2,1)=2(0,1),(1,2)=(-1,-1)=-1(2,0),(2,0)=(2,2)=2, 2-1=1(2+1)=3(0+0)=0

  4. Red Rule

    5. The Red rule is the last rule to be applied. The Red rule is almost identical to the Orange rule, however because there is no guarantee that there are any single assets with a level 2 classification the resultant negative value is not replaced.

    If the Adjacency2 value of the aggregated asset is negative and the classification (after the Green rule has been applied) is level 2, then the Red rule forces the classification level up one level to level 3.

    In the example below, the Green rule has caused the classification level to be set to the higher of the two individual classification levels. The Blue rule has also already been executed because the two parameters in the Adjacency1 column are negative. This causes the value in the Adjacency2 column to drop from 0 to -1. At this point the conditions for the Red rule are met, and so the classification of abcdefgh,i is upgraded to level 3.

    AssetCltnAdj1Adj2C1C2
    i 1 2 1 1 0
    abcdegfh 2 -3 0 7 1
    abcdefgh,i(2,1)=2 3(-3,1),(2,7)=(-4,-5)=-5(0,0),(1,1)=(0,0)=0, 0-1=-1(7+1)=8(1+0)=1

Last Edited: 17-Dec-05 DCO