| Property | Description | USD level | USD/MTLX level | MTLX level | Status | Proposal(s) |
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| Support nodes with multiple outputs |
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| issue 1581 logged. Internal issue: USD-6820 |
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| definition information association | Import does not capture the correct association between a definition and a nodegraph sometimes. |
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| Issue 1629 logged | - Specific code fix proposed for conversion to MaterialX
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| definition variations | Definitions may be specified in a variety of different ways. Not all appear to be consumable properly. Some deal with definition discovery. |
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| issue 1636 logged | - Refactor import discovery logic. (PR 1641)
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| definition search path | Related to definition discovery (definition not found in path) |
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| Issue 1586 logged. Internal issue USD-6941 | - consider USD search path env variable on read for mtlx (partial, no concensus) (PR 1628)
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| load / reload | Robustness / repeatability of loading documents |
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| - Issue 1504 logged. Internal issue: USD-6670 (data loss)
- Issue 1502 logged. Internal issue: USD-6669 (node missing)
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