diff --git a/specification/fig_1.svg b/specification/fig_1.svg
new file mode 100644
index 0000000..f3782ac
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@@ -0,0 +1 @@
+
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diff --git a/specification/fig_2.svg b/specification/fig_2.svg
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@@ -0,0 +1,272 @@
+
+
+
diff --git a/specification/fig_3.svg b/specification/fig_3.svg
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index 0000000..c367206
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@@ -0,0 +1,496 @@
+
+
+