From LETRS Volume 1, page 16, "According to Gough and Tunmer (1986) and Hoover and Tunmer (2020), the two most important components of learning to read are accurate and automatic word recognition and linguistic comprehension. Now commonly referred to in reading research literature as the Simple View of Reading (SVR), emphasizes that proficient readers have well-developed skills in both domains. The SVR states that reading comprehension is the product of printed word recognition and language comprehension."
From LETRS Volume 1, pages 35-36, "Within each of these two major domains, however, are additional specific skills that we can identify for the purpose of understanding how proficient reading develops and how skilled readers might differ from struggling readers. Each major domain of the SVR - word recognition and language comprehension includes strands that are definable, measurable, and somewhat independent."
From LETRS Volume 1, page 159, "Scarborough's Reading Rope (2001) elaborates on the SVR by showing how each domain comprises a set of measurable subskills. Each of these subskills can be (and has been) widely researched, and each has known relationships with the others. Each strand, if underdeveloped, could interfere with reading growth, and each should be addressed if instruction is comprehensive."