Mapping subjects

[banukutlu]

https://github.com/psu-libraries/psulib_blacklight/wiki/Subject-Fields-Index-and-Display

[banukutlu]

@ruthtillman:

1. do we want to display a subject facet on the sidebar?
2. for subject searching do we want to boost more on specific subjects for example primary subject having more boost than additional subjects? Or if not, just having one subject field for search with all the listed MARC fields is sufficient?
   Below mappings what we had originally:
   • Primary subject: 600#{ATOU}:610#{ATOU}:611#{ATOU}:630#{ATOU}:650abcde:651ae:653a:654abcde:655abc
   • Additional subjects: 600vwxyz:610vwxyz:611vwxyz:630vwxyz:650vwxyz:651vwxyz:654vwxyz:655vwxyz
   • Subject Topic Facet:600|*0|abcdq:610|*0|ab:611|*0|ab:630|*0|ab:650|*0|a:653|*0|a
3. Could you add which subfields we will be using for each field for searching in the documentation? Same as display - 650|*0|abcdvxyz:650|*2|abcdvxyz:650|*1|abcdvxyz:650|*3|abcdvxyz:650|*6|abcdvxyz:650|*7|abcdvxyz:600abcdfklmnopqrtvxyz:610abfklmnoprstvxyz:611abcdefgklnpqstvxyz:630adfgklmnoprstvxyz:647acdgvxyz:648avxyz:651avxyz?

[ruthtillman]

1. Yes, and/but let's make it 650|*0|aa:650|*0|x:650|*1|aa650|*1|x:651|*0|a651|*0|x:600abcdtq:610abt:610x:611abt:611x: for the foreseeable future. This is based on what's in the original traject subject_topic_index and what we're indexing for display

[ruthtillman]

2. Yes, let us value Primary Subject more highly than other subjects.

3. I added a column to the table.

[banukutlu]

@ruthtillman

1. How do we label for the sidebar facet? Subject or Topic or sth else?
2. Are the MARC mappings I pasted for the primary and additional subject fine? Facet one will be changed with what you gave but wanted to double check for the two other?

[ruthtillman]

1. Subject
2. For search, yes I think so.

[banukutlu]

@ruthtillman

In the wiki, subject fields table does not include 653, 654, 655 and also647 and 648 are listed but these two fields are not used in either subject search fields (primary and additional subjects) but used for subject_display. Also some subfields does not seem to be consistent between the wiki and our mappings right now. So I just want to make sure, should I update the wiki with the mappings or should I change the below mappings accordingly?

Primary subjects: 600#{ATOU}:610#{ATOU}:611#{ATOU}:630#{ATOU}:650abcde:651ae:653a:654abcde:655abc
Additional subjects: 600vwxyz:610vwxyz:611vwxyz:630vwxyz:650vwxyz:651vwxyz:654vwxyz:655vwxyz.

Also I think we should try to keep these two fields inline with subject display. Could you pls review the fields mappings again?

[banukutlu]

@ruthtillman could you also review the subject facet mapping again? https://github.com/psu-libraries/psulib_blacklight/wiki/Subject-Fields-Index-and-Display#subject-facet

Are subfields correct here: 650|*0|aa?

[ruthtillman]

@banukutlu flagging to review first thing tomorrow morning. Of your question and Charlie's today, his was faster to answer.

[ruthtillman]

@banukutlu one quick answer, the repeated a is correct. It's a little weird but occasionally the data may have that. It won't repeat if more than one a doesn't exist.

[ruthtillman]

@banukutlu updated wiki. Added fields requested, removed 655 from index for this, also removed ATOU because I didn't like a couple things it would be indexing so made more specific.

[banukutlu]

@ruthtillman an example with the latest mappings:

• subject_topic_facet_ssim is the sidebar facet
• subject_tsim and subject_addl_tsim are in keyword search and subject search (along with their unstemmed versions)
• subject_display_ssm and subject_facet are used for displaying and linking hierarchical subjects

https://blackcat01qa.libraries.psu.edu/catalog/21601671/librarian_view

21601671     subject_addl_tsim         China Shanghai History 20th century. | China Shanghai. | Civilization 20th century. | Shanghai.
21601671     subject_display_ssm       1900-1999 | Photography—China—Shanghai—History—20th century | Modernism (Art)—China—Shanghai | Civilization | Modernism (Art) | Photography | Shanghai (China)—Civilization—20th century | China—Shanghai
21601671     subject_facet             1900-1999 | Photography—China—Shanghai—History—20th century | Modernism (Art)—China—Shanghai | Civilization | Modernism (Art) | Photography | Shanghai (China)—Civilization—20th century | China—Shanghai
21601671     subject_topic_facet_ssim  Photography | History | Modernism (Art) | Shanghai (China) | Civilization
21601671     subject_tsim              1900-1999 | Photography | Modernism (Art) | Civilization. | Photography. | Shanghai (China) | China

[banukutlu]

@ruthtillman can you clarify the below paragraph from our subjects doc:

Subject-field specific searches full or partial match. e.g. Quilt in subject search field would return records with Quiltmakers and those with NAMES Project AIDS Memorial Quilt (and others). On the other hand a subject search of African American quiltmakers would return only records which had all those words in subject, hence just ones with subject African American quiltmakers.

[ruthtillman]

@banukutlu I tried clarifying -- does that help?

[banukutlu]

yes, Thank you!