The Shared Object
Two users sharing a
pig as a SVG/XML document.
Figure 1 - The original pig
<?xml version="1.0" encoding="UTF-8" standalone="no"?><!-- Created with Sodipodi ("http://www.sodipodi.com/") -->
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
version="1"
x="0.00000000" y="0.00000000"
width="744.094482" height="1052.36218" id="svg548">
<defs id="defs550" />
<path transform="matrix(1.074121,-0.270842,-0.302968,-1.075925,164.8516,1705.975)"
style="font-size:12;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:10;"
id="path571" />
<path d="M 282.925 291.907
C 282.925 291.907 282.925 308.374 290.41 255.98
C 297.895 203.586 308.374 218.556 321.847 242.507
C 330.828 267.956 332.325 291.907 333.822 341.307
C 330.828 402.682 285.919 345.798 284.422 344.301
C 282.925 342.804 284.422 296.398 282.925 291.907 z "
transform="translate(215.5621,49.39969)"
style="font-size:12;fill:#ede2f0;fill-rule:evenodd;stroke:#000000;stroke-width:10;"
id="path570" />
<path d="M -13.4726 384.718
C -1.49696 263.465 -23.9513 458.069 -10.4787 347.294
C 2.99392 236.52 20.9574 184.126 38.9209 196.102
C 56.8844 208.077 70.3571 242.507 73.351 278.434
C 76.3449 314.361 -11.9757 381.725 -13.4726 384.718 z "
transform="translate(229.0347,47.90265)"
style="font-size:12;fill:#ede2f0;fill-rule:evenodd;stroke:#000000;stroke-width:10;"
id="path569" />
<ellipse cx="175.144211" cy="252.986053"
rx="212.568192" ry="218.556000"
transform="matrix(1.000000,0.000000,0.000000,1.089041,226.0409,269.3809)"
style="font-size:12;fill:#eabed9;stroke:#000000;stroke-width:8.38467;stroke-linecap:square;"
id="path552" />
<ellipse cx="310.619019" cy="311.367462"
rx="60.626846" ry="41.914825"
transform="matrix(0.830050,0.747115,-0.651464,0.951922,522.0934,-37.46310)"
style="font-size:12;fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:8.84969;"
id="path559" />
<ellipse cx="197.598587" cy="479.026855"
rx="160.174606" ry="121.253662"
transform="matrix(1.009346,0.000000,0.000000,1.061728,257.1272,124.6172)"
style="font-size:12;fill:#eabed9;fill-rule:evenodd;stroke:#000000;stroke-width:9.65992;"
id="path553" />
<ellipse cx="135.474792" cy="476.781433"
rx="42.663330" ry="42.663330"
transform="translate(263.4648,169.1563)"
style="font-size:12;fill:#ede3f0;fill-rule:evenodd;stroke:#000000;stroke-width:10;"
id="path554" />
<ellipse cx="135.474792" cy="476.781433"
rx="42.663330" ry="42.663330"
transform="matrix(1.140349,0.000000,0.000000,1.245614,367.2015,37.08264)"
style="font-size:12;fill:#ede3f0;fill-rule:evenodd;stroke:#000000;stroke-width:8.39053;"
id="path556" />
<ellipse cx="58.381401" cy="282.925232"
rx="94.308418" ry="70.357056"
transform="matrix(0.747393,-0.742953,0.730127,0.760522,55.92289,261.5735)"
style="font-size:12;fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:9.48791;"
id="path557" />
<ellipse cx="84.578186" cy="308.373535"
rx="41.166374" ry="38.920898"
transform="translate(244.0043,152.6898)"
style="font-size:12;fill-rule:evenodd;stroke-width:1pt;"
id="path558" />
<ellipse cx="84.578186" cy="308.373535"
rx="41.166374" ry="38.920898"
transform="matrix(0.620830,0.518754,-0.367218,0.483684,629.5759,321.9234)"
style="font-size:12;fill-rule:evenodd;stroke-width:1pt;"
id="path560" />
</svg>Concurrent Modifications
They work concurrently on their copies.
The First Copy
The first user colorizes pig's eyes in yellow.
Figure 2 - First user update the pig eyes
As the picture is a XML document, this modification relies on the following change to the document.
The style attribute of one node has been changed from :
style="font-size:12;fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:8.84969;"
to :
style="font-size:12;fill:#ffff6d;fill-rule:evenodd;stroke:#000000;stroke-width:8.84969;"
The Second Copy
At the same time, the second user chooses to add a red mouth.
Figure 3 - Second user add a red mouth
This change performs the addition of the following node to the document :
"M 299.392 752.97
C 276.937 711.056 264.962 697.583 294.901 715.546
C 324.84 733.51 369.749 758.958 371.246 769.437
C 372.743 779.916 299.392 755.964 299.392 752.97 z "
transform="translate(5.987854,-1.496994)"
style="font-size:12;fill:#e10008;fill-rule:evenodd;stroke:#000000;stroke-width:10;"
id="path574" />
The Final pig
Using so6 they synchronize their copies in order to apply modifications done by each other.
Consequently, they converge to a new pig with yellow eyes and a red mouth.
Figure 4 - The final pig
The merge can be performed on any XML data, whether it represents graphics, as here, or documents or data.
The merge is XML-aware and merges the XML trees intelligently.
Complex graphics, data and documents can therefore be merged.