A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | ||
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1 | HL Weights | Your Weights (0-3) | Format 1 | Format 2 | Format 3 | Format 4 | Format 5 | Format 6 | Format 7 | Format 8 | Format 9 | Format 10 | Grading Key | Grading Approach | |||||||||
2 | Sustainability Factors: Adoption | Dependency on a single organization or company (Yes, No) | 3 | Green = Not dependent on only one group; Yellow = Dependent on one group | Research the corporate or organizational ownership of each file format. | ||||||||||||||||||
3 | Sustainability Factors: Adoption | Widespread use by consumers (Low, Medium, High) | 3 | Green = Widespread use by consumers; Yellow = moderate use by consumers; Red = low use by consumers | Examine adoption by end-user hardware and software oriented toward the consumer market. | ||||||||||||||||||
4 | Sustainability Factors: Adoption | Widespread use by professionals (Low, Medium, High) | 3 | Green = Widespread use by Professionals; Yellow = Moderate use by professionals; Red = Low use by professionals | Examine adoption by end-user hardware and software oriented toward the professional market. | ||||||||||||||||||
5 | Sustainability Factors: Adoption | Archival use | 1 | Green = Currently employed for image sequences in archive settings; Yellow = Currently employed for still images in archive settings; Red = use for archive scenarios is currently unknown | Evaluate statements made by national and well-known libraries and archives internationally in order to identify existing use of these formats as archival targets. | ||||||||||||||||||
6 | Sustainability Factors: Adoption | Community / 3rd party support (Low, Medium, High) | 1 | Green = Widespread community support; Yellow = moderate community support; Red = Low or no community support | Examine community groups or community-based software or hardware that support the format's continued use (creation, editing, rendering). | ||||||||||||||||||
7 | Sustainability Factors: Adoption | Developer / corporate support | 1 | Green = Standards-body support; Yellow = Active corporate support; Red = Individual or no current support | Research the corporate or organizational support of software or hardware that supports the format's continued use (creation, editing, rendering). | ||||||||||||||||||
8 | Sustainability Factors: Adoption | Geographic spread | 1 | Green = Worldwide use; Red = Unknown use | Based on known use of the format geographically. | ||||||||||||||||||
9 | Sustainability Factors: Adoption | Lifetime | 1 | Green = more than 15 years; Yellow = 5 to 15 years; Red = 1 to 5 years | A calculation based on the year the format came into general use. | ||||||||||||||||||
10 | Sustainability Factors: Adoption | Revision rate | 1 | Green = stable with minimal updates; Yellow = Frequent updates; Red = Unknown state of updates | A calculation based on the number of revisions total divided by the format's lifetime in years. | ||||||||||||||||||
11 | Sustainability Factors: Adoption | Last revision | 1 | Green = stable with minimal updates; Yellow = Frequent updates; Red = Unknown state of updates | Last published revision date for the format. | ||||||||||||||||||
12 | Sustainabililty: Adoption | Format expertise available (Low, Medium, High) | 3 | Green = format is common and there is expertise at HUL; Yellow = format is uncommon and there is some knowledge of the format at HUL; Red = format is rare and there is little knowledge of the format at HUL | Assess whether repository staff have knowledge / experience with a given format. | ||||||||||||||||||
13 | Sustainability Factors: Adoption | Backward compatibility | 2 | Green = format is backward compatible with previous versions; Yellow = format is partially backward compatible; Red = it is unknown whether the format is backward compatible | Review statements in the format specification whether the format is designed to be backward compatible with previous versions of the format. | ||||||||||||||||||
14 | Sustainability Factors: Disclosure | Availability of specifications (Poor, Fair, Good) | 3 | Green = available from trusted source; Yellow = available, but from anonymous or unrelated source; Red = unavailable | Based on an attempt to acquire a copy of the format specification. | ||||||||||||||||||
15 | Sustainability Factors: Disclosure | Degree to which specification is complete and understandable (Poor, Fair, Good) | 2 | Green = specification is complete and understandable; Yellow = specification is complete and understandable but has some undocumented areas; Red = specification is not clearly documented and understandable | When specifications can be acquired, evaluate the thoroughness of the specification for the format, for example - does it cover for example specifics of file construction, image encoding(s), color management, metadata, legal issues, revision process? | ||||||||||||||||||
16 | Sustainability Factors: Disclosure | Standardized (Poor, Fair, Good) | 2 | Green = via standards body; Yellow = format specification is published, but not with standards body as a standard; Red = format is not standardized | Assess the degree to which the format is managed by a standards body, accepted as de facto, or not standardized by any community. | ||||||||||||||||||
17 | Sustainability Factors: Transparency | Level of format complexity | 2 | Green = Format is clearly documented, self-describing, and understandable; Yellow = Format is understood, but of medium complexity in terms of decoding or encoding; Red = Format is opaque, or of high complexity | Assess the specification for a given format; when no specification is available, review format owners' websites or other triangulated web sources. Additionally, use hex editors and metadata extraction tools to look closely at samples. | ||||||||||||||||||
18 | Sustainability Factors: Transparency | Ease of accurate identification | 3 | Green = files can be identified manually; Yellow = files can be identified, but cannot be distinguished from related file types; Red = files cannot be identified easily | Test ability to identify the format manually by a method other than the file extension. | ||||||||||||||||||
19 | Sustainability Factors: Transparency | Degree to which compression is understood | 2 | Green = Compression technique is understood and common; Yellow = Compression technique is documented, but not common; Red = Compression technique is not understood | Based on the format's published compression types, assess the relative transparency of the compression algorithm (as well as its relative popularity). | ||||||||||||||||||
20 | Sustainability Factors: Transparency | Difficulty of tool dev for accurate identification (Low, Medium, Hard) | 2 | Green = one of FITS current tools recognizes the format; Yellow = none of FITS current tools recognizes the format but tools exist that do and can be integrated; Red = no current characterization tools recognize the format | Identify automated tools to support identifying the file accurately by a method other than the file extension. | ||||||||||||||||||
21 | Sustainability Factors: Transparency | Ease of accurate validation (Poor, Moderate, Good) | 2 | Green = file validator exists; Red = file validator does not exist | Identify format validators that support automated validation of the given format. | ||||||||||||||||||
22 | Sustainability Factors: Self-documentation | Error-tolerance | 1 | Green = has good support for bit errors and dropped frames; Yellow = has standard support for bit errors; Red = unknown | Review statements in the format specification whether the format is designed to support error-tolerance, both in terms of how compression is applied and in terms of playing the image in a temporal sequence. | ||||||||||||||||||
23 | Sustainability Factors: Self-documentation | Technical metadata support | 1 | Green = Supports standard camera-centrci and image-centric technical metadata and supports additional industry standard technical metadata, i.e., Exif, IPTC, ICC, and/or XMP; Yellow = Supports standard camera-centric and image-centric technical metadata; Red = No support for technical metadata | Assess format specifications to understand technical metadata support within the file, as well as any supported embedded (or sidecar) extensions; when no specification is available, examine format owners' websites or other triangulated web sources. Additionally, use hex editors and metadata extractors to evaluate sample files. | ||||||||||||||||||
24 | Sustainability: Self-documentation | Descriptive metadata support | 1 | Green = Supports standard camera-centrci and image-centric technical metadata and supports additional industry standard technical metadata, i.e., Exif, IPTC, ICC, and/or XMP; Yellow = Supports standard camera-centric and image-centric technical metadata; Red = No support for technical metadata | Assess format specifications to understand descriptive metadata support within the file, as well as any supported embedded (or sidecar) extensions; when no specification is available, review format owners' websites or other triangulated web sources. Additionally, use hex editors and metadata extractors to evaluate sample files. | ||||||||||||||||||
25 | Sustainability Factors: External Dependencies | Browser Support | 1 | Green = Supported natively; Yellow = supported with plugin; Red = not supported | Research native format support across common web browsers, including Safari, Internet Explorer, Firefox, Chrome, and Opera. | ||||||||||||||||||
26 | Sustainability Factors: External Dependencies | Dependencies on particular HW/SW | 3 | Green = can be created and edited with free tools; Yellow = can be created and edited with a mixture of free and commercial tools; Red = can only be created and edited by commercial tools | Research the relative dependency of the format on specific HW/SW for creation. Some formats can only be created by one HW/SW combination, others can be generated with a variety of HW/SW combinations. | ||||||||||||||||||
27 | Sustainability Factors: External Dependencies | Quantity and availability of rendering software | 3 | Green = can be rendered on many available tools; Yellow = can be rendered on a few available tools; Red = can only be rendered on one or a couple of commercial tools | Research the availability of rendering software for the format, as well as the quantity of rendering tools for a given format. | ||||||||||||||||||
28 | Sustainability Factors: Impact of patents | Legal restrictions affecting use now or long-term | 3 | Green = no legal restrictions; Yellow = restrictions exist but are not applied, or do not inhibit; Red = patents or licences apply | Identify potential legal restrictions associated with a format (or its required encodings or color spaces); when no specification is available, examine format owners' websites or other triangulated web sources. | ||||||||||||||||||
29 | Sustainability Factors: Technical Protection Mechanisms | Support for technical protection mechanisms | 2 | Green = No support for encryption of image data or wrapper; Yellow = support for encryption, and support to store encryption keys; Red = opaque support for encryption | Evaluate format specifications to understand whether encryption or other protection mechanisms are supported by the format; when no specification is available, review format owners' websites or other triangulated web sources. | ||||||||||||||||||
30 | Cost Factors | Cost to maintain environment for access or processing | 3 | Green = free tools exist and are dependable; Yellow = mix of free and commercial tools needed; Red = commercial tools needed | Review the availability of tools to access or process files of a given format and the cost of said tools. | ||||||||||||||||||
31 | Cost Factors | Uncompressed/raw storage requirements | 0 | ||||||||||||||||||||
32 | Cost Factors | Storage (with max compression applied) requirements | 0 | ||||||||||||||||||||
33 | Quality and functionality factors | Colorspaces supported | 3 | Green = supports at least RGB and/or CFA/Raw; Yellow = supports only YCbCr; Red = unknown | Review statements in the format specification as to which color spaces are supported by the format and its supported image encodings; when no specification is available, review format developers' website or triangulated web sources. | ||||||||||||||||||
34 | Quality and functionality factors | Max Bits per Color Channel | 3 | Green = 10 or more bits per channel; Yellow = less than 10 bits per channel | Review statements in the format specification as to the maximum bits per color channel supported by the format and its supported image encodings; when no specification is available, review format developers' website or triangulated web sources. | ||||||||||||||||||
35 | Quality and functionality factors | Max Channels Supported | 3 | Green = supports 1-4 channels; Yellow = supports unlimited channels (could yeild unwieldy and complex files) | Review statements in the format specification as to the maximum color channels supported by the format and its supported image encodings; when no specification is available, rely on format developers' website or triangulated web sources. | ||||||||||||||||||
36 | Quality and functionality factors | Max Bit Depth Overall | 3 | Green = supports 1-4 channels; Yellow = supports unlimited channels (could yeild unwieldy and complex files) | Calculate max bits per color channel multiplied by max color channels supported (unless stated otherwise by the format specification). | ||||||||||||||||||
37 | Quality and functionality factors | Max resolution | 3 | Identify stated limits of the maximum pixel resolution for a given format. | |||||||||||||||||||
38 | Quality and functionality factors | Ability to encode in true lossless compression | 3 | Green = supports lossless compression; Red = supports only lossy compression | Review statements in the format specification as to the support for lossless compression by the format and its supported image encodings; when no specification is available, rely on format developers' website or triangulated web sources. | ||||||||||||||||||
39 | Quality and functionality factors | Max Chroma subsampling | 3 | Green = none or 444; Yellow = less than 444 | Review statements in the format specification as to the support for chroma subsampling (as well as max sub-sampling supported) by the format and its supported image encodings; when no specification is available, review format developers' website or triangulated web sources. | ||||||||||||||||||
40 | Quality and functionality factors | Compression ratio | 3 | Green = no compression, or lossless; Yellow = low compression ratio; Red = high compression ratio | Review statements in the format specification as to the types of compression supported as well as the known compression ratios provided by each supported type of compression. | ||||||||||||||||||
41 | Additonal notes | Image Wrapper Options | |||||||||||||||||||||
42 | Additonal notes | Packaging Options | |||||||||||||||||||||
43 | Additonal notes | Purpose | |||||||||||||||||||||
44 | Additonal notes | Notes | |||||||||||||||||||||
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47 | Color Weights Only | Green | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||
48 | Yellow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
49 | Red | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
50 | Weighted Score | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
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52 | HL Weights | Green | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||
53 | Yellow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
54 | Red | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
55 | Weighted Score | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
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57 | Your Weights | Green | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||
58 | Yellow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
59 | Red | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
60 | Weighted Score | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||
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