Layer order and arranging layers
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Layer stack is an ordered set of layers. Layer's position in the stack reflects to the topic resolution in Wandora. Layer order in the stack has an effect to the topics and associations in Wandora. General rule is that a topic inherits properties from the top layer consisting the topic property. Top property overlays all other properties in lower layers. | Layer stack is an ordered set of layers. Layer's position in the stack reflects to the topic resolution in Wandora. Layer order in the stack has an effect to the topics and associations in Wandora. General rule is that a topic inherits properties from the top layer consisting the topic property. Top property overlays all other properties in lower layers. | ||
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To arrange layer order in the stack you can | To arrange layer order in the stack you can | ||
* Drag and drop layers. | * Drag and drop layers. | ||
* Use submenus in '''Layers > [[ArrangeLayers|Arrange layers]]'''. | * Use submenus in '''Layers > [[ArrangeLayers|Arrange layers]]'''. | ||
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| + | == Arranging Layers Example == | ||
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| + | Lets say we have two layers in Wandora, layer1 and layer2. Both layers contain a topic with subject identifier of http://www.wandora.net/Finland describing our home country Finland. Due to merge rule these two topics merge in Wandora. Now lets assume that both topics have different base name. Topic in layer1 has a base name '''Suomi''' while the topic in layer layer2 has a base name '''Finland'''. Both are valid base names and the question is which base name should Wandora use for the merged topic? Remember that topics may contain only one unscoped base name in Wandora. The answer to the question lies in the order of layer1 and layer2. When layer1 is above layer2 merged topic has base name '''Suomi''' and when the layer1 is below the layer2 merged topic has base name '''Finland'''. This applies not only to base names but also variant names and occurrences of same type and scope. | ||
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| + | Below is a screenshot of Wandora where layer1 overlays layer2. | ||
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| + | [[Image:arranging_layers_example1.gif]] | ||
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| + | [[Image:arranging_layers_example2.gif]] | ||
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| + | Analogy drawn earlier between the layer concept of Wandora and graphic design applications may lighten the effect of layer order also. In graphic design applications the graphic element in top layer overlays the elements in lower layers. Similarly the base name in Wandora's top layer overlays base name's of merged topics in lower layers. Similarly the occurrence text of top layer overlays the occurrence of merged topics in lower layers. | ||
Revision as of 13:15, 27 February 2007
Layer stack is an ordered set of layers. Layer's position in the stack reflects to the topic resolution in Wandora. Layer order in the stack has an effect to the topics and associations in Wandora. General rule is that a topic inherits properties from the top layer consisting the topic property. Top property overlays all other properties in lower layers.
To arrange layer order in the stack you can
- Drag and drop layers.
- Use submenus in Layers > Arrange layers.
Arranging Layers Example
Lets say we have two layers in Wandora, layer1 and layer2. Both layers contain a topic with subject identifier of http://www.wandora.net/Finland describing our home country Finland. Due to merge rule these two topics merge in Wandora. Now lets assume that both topics have different base name. Topic in layer1 has a base name Suomi while the topic in layer layer2 has a base name Finland. Both are valid base names and the question is which base name should Wandora use for the merged topic? Remember that topics may contain only one unscoped base name in Wandora. The answer to the question lies in the order of layer1 and layer2. When layer1 is above layer2 merged topic has base name Suomi and when the layer1 is below the layer2 merged topic has base name Finland. This applies not only to base names but also variant names and occurrences of same type and scope.
Below is a screenshot of Wandora where layer1 overlays layer2.
File:Arranging layers example1.gif
File:Arranging layers example2.gif
Analogy drawn earlier between the layer concept of Wandora and graphic design applications may lighten the effect of layer order also. In graphic design applications the graphic element in top layer overlays the elements in lower layers. Similarly the base name in Wandora's top layer overlays base name's of merged topics in lower layers. Similarly the occurrence text of top layer overlays the occurrence of merged topics in lower layers.
