Parts
Parts are physical entities, in contrast to Cataloged Items (an abstract entity) or binary objects (such as Images). One or many parts may comprise a Cataloged Item, and parts may be defined as the minimal units for which storage location, usage, and condition are tracked. (“Parts are things to which you can stick barcodes.”) Parts are generally the equivalent of dwc:MaterialSample
Part Names
specimen_part . part_name VARCHAR(255) not null
Part names provide information about the physical objects associated with the catalog record. They can be subsampled, loaned, and have one or more attributes associated with them.
Part names should refer to specific anatomical parts or recognized groups of parts (e.g., “postcranial skeleton”). With rare exception, part names are the singular form of a noun. There is no requirement to include a part in a catalog record.
A part name should be entered for each distinct physical object associated with the catalog record e.g., skull and postcranial skeleton. Parts already contained in the postcranial skeleton may be entered on separate lines for clarity when necessary. An acceptable list of part names in a catalog record might be:
- skull
- postcranial skeleton
- right humerus
Such an entry would designate a postcranial skeleton that has a disarticulated right humerus. Situations like this are typically created when a subsample is removed for a loan. The addition of appropriate part condition, disposition, remark, and/or attribute are used to clarify.
Disposition
Disposition describes the curatorial status of parts. Values are controlled by a code table. Github discussion Code Table Committee discussion
Condition
Coll_Object . Condition VARCHAR(255) not null
Condition is free-text generalized with very limited metadata. It may be used used for entries such as “broken” or “dissected.”
The community recommends following condition ratings be used specifically to parts with the “is_tissue” flag see Tissue:
- 5 – The best tissues. These have gone from a freshly killed animal directly into liquid nitrogen. The animal should not have been dead for more than thirty minutes.
- 4 – These are tissues taken from animals only a few hours post mortem at cool temperatures. Such tissues should not have been previously frozen and thawed.
- 3 – These are tissues taken from an animal that has been dead less than sixteen hours at cool temperatures, or tissues taken from an animal that was hard frozen soon after death and then thawed for preparation. Fur is not slipping.
- 2 – These tissues may be beginning to show signs of decomposition.
- 1 – These tissues are flaccid and thoroughly autolyzed. They probably stink.
Note that there are many part attributes that may confirm or conflict with the information in condition. These include, but are not limited to:
- condition report is basically condition, but without the structural limitations (eg you can fully expose how things change over time) and with full metadata
- preservation
- preservation need
- remaining volume
- storage temperature
- tissue quality
Lot Count
Coll_Object . Lot_Count NUMBER(22) not null
A Lot Count is an integer that enumerates how many similar items comprise a part. The value is frequently one (1), but collections of fish and invertebrates usually assign a single catalog number to all of the individual organisms of one species from one collecting event. Thus, 86 minnows of one species from one place, collected at the same time, and stored together in one jar of alcohol would be a cataloged item with one part, and that part would have a lot count of 86 whole animals.
Lot counts are not static; lots may be split into smaller lots by creating a separate part. If one of those 86 minnows was prepared for skeletal study by clearing and staining, it would be necessary to create a second “part” within the catalogued item, e.g.:
| Catalog # | Part Name | Pres Method | Lot Cnt |
|---|---|---|---|
| 123456 | whole animal | alcohol | 85 |
| 123456 | skeleton | cleared and stained | 1 |
A cryotube of embryos or a box of ribs should have a lot count. In contrast, three tubes of muscle from an individual will be tracked separately; these should be entered as three collection objects, each with a lot count of one.
There must be a value of at least one (1) for each part, and the maximum is 99999. Lot counts are sometimes approximate. For example, a three-liter jar of small minnows in alcohol might be given a lot count of 400, at least until such time as someone counts the minnows.
Examples of lot count usage:
| Material | Entry |
|---|---|
| Two embryos stored in the same crytube | embryo (lot count = 2) |
| Two liver samples stored in individual tubes | liver (lot count = 1) |
| Three tubes each containing five nematodes | nematode (lot count = 5) nematode (lot count = 5) nematode (lot count = 5) |
| Ten vertebrae in a box | vertebra (lot count = 10) |
| A jar of five salamanders of the same species from the same collecting event. | whole animal (lot count = 5) |
Sampled From
Specimen_Part . Sampled_From_Obj_ID NUMBER(22) not null
Sampled From designates a part derived from another part. This functionality may be used to create tissue subsamples for destructive analysis, split particularly valuable samples into multiple freezers to eliminate single-point failure risk, to better track a specific bone (e.g., for loan), or for any other situation which results in one part being split into multiple parts or altered into a new type of part.
Remarks
Coll_Object_Remark . Coll_Object_Remarks VARCHAR2(4000) null
Use remarks to document non-standard information pertaining to the specimen part. Do not use remarks for any information which could be recorded with more structure elsewhere, including Part Attributes.
Preservation
Part Preservation is controlled by a code table. Any part may have any number of preservation events, and like all Part Attributes they may include date and determiner information. “Tissueness” is an attribute of preservation.
- A part with no preservation attributes is not a tissue
- A part with one or more preservation attributes having a NULL preservation flag is not a tissue
- A part with one or more preservation attributes having a TRUE preservation flag may be a tissue, except
- A part with one or more preservation attributes having a FALSE preservation flag cannot be a tissue
For example, a part preserved in “90% ethanol” would be a tissue, unless it also has an additional (probably earlier) “formalin” attribute.
How To
Instructions for doing specifc tasks related to Parts in Arctos
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